Switched to pnpm from yarn.

Dockerfile

@@ -3,10 +3,9 @@ FROM node:22-alpine AS deps
 # Check https://github.com/nodejs/docker-node/tree/b4117f9333da4138b03a546ec926ef50a31506c3#nodealpine to understand why libc6-compat might be needed.
 RUN apk add --no-cache libc6-compat
 WORKDIR /app
-COPY package.json yarn.lock ./
-# Add yarn timeout to handle slow CPU when Github Actions
-RUN yarn config set network-timeout 300000
-RUN yarn install --frozen-lockfile
+COPY package.json pnpm-lock.yaml ./
+RUN npm install -g pnpm
+RUN pnpm install --frozen-lockfile
 
 # Rebuild the source code only when needed
 FROM node:22-alpine AS builder
@@ -22,7 +21,8 @@ ENV BASE_PATH=$BASE_PATH
 
 ENV NEXT_TELEMETRY_DISABLED=1
 
-RUN yarn build-docker
+RUN npm install -g pnpm
+RUN pnpm build-docker
 
 # Production image, copy all the files and run next
 FROM node:22-alpine AS runner
@@ -36,10 +36,13 @@ ENV NODE_OPTIONS=$NODE_OPTIONS
 
 RUN addgroup --system --gid 1001 nodejs
 RUN adduser --system --uid 1001 nextjs
+RUN npm install -g pnpm
 
 RUN set -x \
     && apk add --no-cache curl \
-    && yarn add npm-run-all dotenv semver prisma@6.1.0
+    && pnpm add npm-run-all dotenv prisma@6.1.0
+
+RUN chown -R nextjs:nodejs node_modules/
 
 COPY --from=builder --chown=nextjs:nodejs /app/public ./public
 COPY --from=builder /app/prisma ./prisma
@@ -59,4 +62,4 @@ EXPOSE 3000
 ENV HOSTNAME=0.0.0.0
 ENV PORT=3000
 
-CMD ["yarn", "start-docker"]
+CMD ["pnpm", "start-docker"]