feat: 🎸 working Dockerfile

Author: prc5

apps/backend/Dockerfile

@@ -21,8 +21,8 @@ RUN pnpm --filter @hype-stack/backend run generate
 # Build backend (uses Nx target)
 RUN npm run backend:build
 
-# Prune dev dependencies to keep runtime image small
-RUN npm prune --omit=dev
+# We need to set CI=true to limit node_modules to production dependencies.
+RUN CI=true pnpm prune --prod
 
 FROM node:${NODE_VERSION} AS runner
 WORKDIR /app