refactor: optimize Dockerfile for multi-stage build

- Split Dockerfile into multi-stage build for improved efficiency
- Added separate builder and runner stages
- Optimized dependency and artifact copying
- Reduced final image size by separating build and runtime steps

apps/api/Dockerfile

@@ -1,7 +1,7 @@
 FROM node:22-alpine AS base
 
 # Rebuild the source code only when needed
-FROM base
+FROM base AS builder
 WORKDIR /app
 COPY . .
 # Install dependencies
@@ -13,6 +13,16 @@ RUN cd apps/api && npm run prisma:generate
 # Build the project
 RUN npx turbo run build --filter=api
 
+# Copy the built project
+FROM base AS runner
+WORKDIR /app
+COPY --from=builder /app/node_modules ./node_modules
+COPY --from=builder /app/package.json ./package.json
+COPY --from=builder /app/package-lock.json ./package-lock.json
+COPY --from=builder /app/apps/api/package.json ./apps/api/package.json
+COPY --from=builder /app/apps/api/dist ./apps/api/dist
+COPY --from=builder /app/apps/api/prisma ./apps/api/prisma
+
 EXPOSE 4000
 # Start the server
 ENTRYPOINT [ "npm", "run", "start:api" ]