Added lib/password. Small tweaks.

src/lib/password.ts

@@ -0,0 +1,11 @@
+import bcrypt from 'bcryptjs';
+
+const SALT_ROUNDS = 10;
+
+export function hashPassword(password: string, rounds = SALT_ROUNDS) {
+  return bcrypt.hashSync(password, rounds);
+}
+
+export function checkPassword(password: string, passwordHash: string) {
+  return bcrypt.compareSync(password, passwordHash);
+}