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CLAUDE.md
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CLAUDE.md
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# CLAUDE.md
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This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
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## Project Overview
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Umami is a simple, fast, privacy-focused alternative to Google Analytics. It's built with Next.js 15 (App Router), TypeScript, and supports multiple database backends (PostgreSQL, ClickHouse, Kafka).
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## Development Commands
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### Package Manager
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- Uses **pnpm** as the package manager (monorepo with `pnpm-workspace.yaml`)
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- Install dependencies: `pnpm install`
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### Development
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- Start development server: `pnpm dev` (runs on port 3001 with Turbo)
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- Build application: `pnpm build` (runs multiple build steps including database setup)
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- Start production server: `pnpm start`
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- Build for Docker: `pnpm build-docker`
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### Database Operations
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- Build Prisma client: `pnpm build-prisma-client`
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- Update database schema: `pnpm update-db`
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- Check database connection: `pnpm check-db`
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- Seed test data: `pnpm seed-data`
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- Change admin password: `pnpm change-password`
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### Code Quality
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- Lint: `pnpm lint` (uses Biome)
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- Format: `pnpm format` (uses Biome)
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- Check (lint + format): `pnpm check` (uses Biome)
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- Test: `pnpm test` (uses Jest)
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- Cypress E2E tests: `pnpm cypress-run` or `pnpm cypress-open`
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### Tracker Script
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- Build tracker script: `pnpm build-tracker` (rollup builds `/public/script.js`)
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- Update tracker: `pnpm update-tracker`
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### Internationalization
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- Generate language files: `pnpm generate-lang`
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- Format language files: `pnpm format-lang`
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- Compile language files: `pnpm compile-lang`
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## Architecture
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### Tech Stack
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- **Frontend**: Next.js 15 (App Router), React 19, TypeScript, Tailwind CSS
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- **Backend**: Next.js API routes, Prisma ORM, multiple database support
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- **Database**: PostgreSQL (primary), ClickHouse (analytics), Kafka (event streaming)
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- **State Management**: Zustand, React Query (TanStack)
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- **Styling**: CSS Modules, Tailwind CSS, `@umami/react-zen` component library
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- **Code Quality**: Biome (linting/formatting), TypeScript, Jest, Cypress
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### Key Directories
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- `src/app/` - Next.js App Router pages and API routes
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- `(collect)/` - Collection endpoints (pixels, links)
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- `(main)/` - Main application UI routes
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- `api/` - REST API endpoints
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- `src/components/` - React components
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- `common/` - Shared UI components
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- `charts/` - Data visualization components
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- `hooks/` - Custom React hooks
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- `src/lib/` - Utility libraries and shared logic
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- `src/tracker/` - Analytics tracker JavaScript (built to `/public/script.js`)
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- `src/styles/` - Global CSS and design tokens
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- `prisma/` - Database schema and migrations
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- `db/` - Database-specific schemas (PostgreSQL, ClickHouse)
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- `scripts/` - Build and utility scripts
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### Database Architecture
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- **Primary Database**: PostgreSQL with Prisma ORM
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- **Analytics Database**: ClickHouse for high-volume analytics data
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- **Event Streaming**: Kafka for real-time event processing
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- **Cache**: Redis for session and data caching
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- Database type determined by `DATABASE_URL` environment variable
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- Queries use `runQuery()` helper that routes to appropriate database
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### API Structure
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- RESTful API built with Next.js Route Handlers
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- Authentication via JWT tokens
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- Main collection endpoint: `/api/send` (handles analytics events)
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- Admin endpoints under `/api/admin/`
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- User/team management under `/api/me/`, `/api/users/`, `/api/teams/`
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- Website analytics under `/api/websites/[websiteId]/`
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### Tracker System
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- JavaScript tracker at `/public/script.js` (built from `src/tracker/`)
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- Configurable via data attributes on script tag
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- Supports event tracking, page views, custom events
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- Can be hosted externally via `TRACKER_SCRIPT_URL` env var
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- Multiple script names supported via `TRACKER_SCRIPT_NAME` env var
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### Environment Configuration
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Required environment variables:
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- `DATABASE_URL` - PostgreSQL connection string
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- `APP_SECRET` - JWT secret key
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Optional environment variables:
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- `CLICKHOUSE_URL` - ClickHouse connection for analytics
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- `KAFKA_URL` - Kafka connection for event streaming
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- `REDIS_URL` - Redis connection for caching
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- `CLOUD_MODE` - Enable cloud-specific features
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- `COLLECT_API_ENDPOINT` - Custom endpoint for tracker
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- `TRACKER_SCRIPT_NAME` - Alternative script names
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- `DISABLE_UI` - Disable web interface (API-only mode)
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## Development Notes
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### Database Setup
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1. Set `DATABASE_URL` in `.env` file
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2. Run `pnpm build` to create database tables and admin user (admin/umami)
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3. For ClickHouse analytics, also set `CLICKHOUSE_URL`
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### Testing
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- Unit tests: `pnpm test` (Jest with `src/lib/__tests__/`)
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- E2E tests: `pnpm cypress-run` (requires running application)
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- Test database: Uses separate test database configuration
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### Code Style
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- Uses Biome for formatting and linting (configured in `biome.json`)
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- Line width: 100 characters
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- Single quotes for strings
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- Trailing commas in multiline objects/arrays
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- TypeScript strict mode enabled
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### Build Process
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The `pnpm build` command runs multiple sequential steps:
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1. `check-env` - Validate environment variables
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2. `build-db` - Build Prisma client and database schema
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3. `check-db` - Verify database connection
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4. `build-tracker` - Build analytics tracker script
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5. `build-geo` - Build GeoIP database
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6. `build-app` - Build Next.js application
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### Docker Deployment
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- Docker image includes standalone Next.js output
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- Uses multi-stage build for production optimization
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- Includes all necessary dependencies
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- Health check endpoint at `/api/heartbeat`
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### Internationalization
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- Uses `react-intl` for translations
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- Messages extracted from `src/components/messages.ts`
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- Compiled to `public/intl/messages/`
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- Default locale: `en-US`, configurable via `DEFAULT_LOCALE` env var
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## Common Tasks
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### Adding a New API Endpoint
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1. Create file in `src/app/api/[path]/route.ts`
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2. Use `parseRequest()` helper for request validation
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3. Use `runQuery()` for database operations
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4. Return appropriate HTTP responses using helpers from `src/lib/response.ts`
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### Adding a New Component
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1. Create component in `src/components/` (organized by feature)
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2. Use CSS Modules for styling (`*.module.css`)
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3. Export TypeScript interfaces/types
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4. Add to appropriate barrel file (`index.ts`) if needed
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### Database Schema Changes
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1. Update `prisma/schema.prisma`
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2. Create migration: `prisma migrate dev --name description`
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3. Update Prisma client: `pnpm build-prisma-client`
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4. Update TypeScript types as needed
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### Adding Tracker Features
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1. Modify `src/tracker/index.js`
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2. Rebuild tracker: `pnpm build-tracker`
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3. Test with local development server
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## Troubleshooting
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### Database Connection Issues
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- Verify `DATABASE_URL` format: `postgresql://user:pass@host:port/db`
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- Check database is running and accessible
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- Run `pnpm check-db` to test connection
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### Build Failures
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- Ensure all environment variables are set
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- Check Node.js version (requires 18.18+)
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- Clear `.next` cache if build issues persist
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### Tracker Not Working
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- Verify script is loaded: check browser console
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- Check CORS headers if hosted on different domain
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- Test with `/api/send` endpoint directly
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@@ -1,7 +1,7 @@
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ARG NODE_IMAGE_VERSION="22-alpine"
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# Install dependencies only when needed
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FROM node:${NODE_IMAGE_VERSION} AS deps
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FROM hub.diyla.com/node:${NODE_IMAGE_VERSION} AS deps
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# Check https://github.com/nodejs/docker-node/tree/b4117f9333da4138b03a546ec926ef50a31506c3#nodealpine to understand why libc6-compat might be needed.
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RUN apk add --no-cache libc6-compat
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WORKDIR /app
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@@ -10,7 +10,7 @@ RUN npm install -g pnpm
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RUN pnpm install --frozen-lockfile
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# Rebuild the source code only when needed
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FROM node:${NODE_IMAGE_VERSION} AS builder
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FROM hub.diyla.com/node:${NODE_IMAGE_VERSION} AS builder
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WORKDIR /app
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COPY --from=deps /app/node_modules ./node_modules
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COPY . .
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RUN npm run build-docker
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# Production image, copy all the files and run next
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FROM node:${NODE_IMAGE_VERSION} AS runner
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FROM hub.diyla.com/node:${NODE_IMAGE_VERSION} AS runner
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WORKDIR /app
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ARG PRISMA_VERSION="6.19.0"
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@@ -1,7 +1,9 @@
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---
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services:
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umami:
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image: ghcr.io/umami-software/umami:latest
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build:
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context: .
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dockerfile: Dockerfile
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ports:
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- "3000:3000"
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environment:
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timeout: 5s
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retries: 5
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db:
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image: postgres:15-alpine
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image: hub.diyla.com/postgres:15-alpine
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environment:
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POSTGRES_DB: umami
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POSTGRES_USER: umami
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