fix(deploy): use dedicated dist-migrations dir and fix sed path in Dockerfile

Dockerfile

@@ -41,8 +41,11 @@ COPY . .
 # Build application
 RUN pnpm build
 
-# Transpile migrations for production runner
+# Transpile migrations to JS for production compatibility (ESM requires extensions)
-RUN pnpm exec tsc migrations/*.ts --outDir migrations_built --module esnext --target esnext --moduleResolution node --esModuleInterop --skipLibCheck || true
+RUN mkdir -p dist-migrations && \
+    npx tsc migrations/*.ts --outDir dist-migrations --module esnext --target esnext --moduleResolution node --esModuleInterop --skipLibCheck || true && \
+    cp migrations/*.json dist-migrations/ 2>/dev/null || true && \
+    sed -i 's/from "\.\/\([^"]*\)";/from ".\/\1.js";/g' dist-migrations/index.js
 
 # Stage 2: Runner
 FROM node:20-alpine AS runner
@@ -65,8 +68,7 @@ ENV NEXT_TELEMETRY_DISABLED=1
 # Copy standalone output and static files
 COPY --from=builder --chown=nextjs:nodejs /app/public ./public
 COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
-COPY --from=builder --chown=nextjs:nodejs /app/migrations_built ./migrations
+COPY --from=builder --chown=nextjs:nodejs /app/dist-migrations ./migrations
-COPY --from=builder --chown=nextjs:nodejs /app/migrations/*.json ./migrations/
 COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
 COPY --from=builder --chown=nextjs:nodejs /app/.next/cache ./.next/cache