Refactor Dockerfile for improved build and runtime stages

Dockerfile

@@ -1,18 +1,34 @@
+# --- Stage 1: Build ---
 FROM node:20-alpine as builder
 
 WORKDIR /app
 
 RUN npm install -g pnpm@9
 
-# Copy necessary files for workspace resolution
 COPY package.json pnpm-lock.yaml pnpm-workspace.yaml ./
 COPY packages packages
 COPY tooling tooling
 COPY .env.production .env
 
-# Install all dependencies
 RUN pnpm install --frozen-lockfile
 
 COPY . .
 
-RUN pnpm build
+RUN pnpm build
+
+
+# --- Stage 2: Runtime ---
+FROM node:20-alpine
+
+WORKDIR /app
+
+COPY --from=builder /app ./
+
+RUN npm install -g pnpm@9 \
+ && pnpm install --prod --frozen-lockfile
+
+ENV NODE_ENV=production
+
+EXPOSE 3000
+
+CMD ["pnpm", "start"]