Test: full esbuild bundle with external deps

Dockerfile

@@ -2,33 +2,40 @@ FROM node:20-slim
 
 ENV DEBIAN_FRONTEND=noninteractive
 
-# Build timestamp: 2026-01-13T03:35
+# Build timestamp: 2026-01-13T03:45
 
 WORKDIR /app
 
+# Install esbuild globally
+RUN npm install -g esbuild
+
 # Copy backend package.json and install deps
 COPY trigo-web/backend/package.json ./package.json
 RUN npm install --omit=dev
 
-# Create a test server with Express + Socket.io
-RUN echo 'import express from "express"; \
-import { createServer } from "http"; \
-import { Server } from "socket.io"; \
-const app = express(); \
-const httpServer = createServer(app); \
-const io = new Server(httpServer, { cors: { origin: true } }); \
-const port = process.env.PORT || 7860; \
-app.use(express.static("app/dist")); \
-app.get("/health", (req, res) => res.json({status: "ok"})); \
-io.on("connection", (socket) => console.log("Client connected:", socket.id)); \
-httpServer.listen(port, "0.0.0.0", () => console.log("Server running on port " + port));' > server.js
+# Copy backend source
+RUN mkdir -p backend/dist/backend/src
+COPY trigo-web/backend/src/ ./backend/src/
+
+# Copy inc folder (needed for esbuild)
+COPY trigo-web/inc/ ./inc/
+
+# Bundle with ESM format, external deps
+RUN esbuild backend/src/server.ts --bundle --platform=node --target=node20 --format=esm \
+    --outfile=backend/dist/backend/src/server.js \
+    --external:express --external:socket.io --external:cors --external:dotenv --external:uuid
 
 # Copy frontend dist
 COPY trigo-web/app/dist/ ./app/dist/
 
+# Copy env files
+COPY trigo-web/backend/.env ./backend/.env
+COPY trigo-web/backend/.env.local ./backend/.env.local
+
 ENV PORT=7860
+ENV HOST=0.0.0.0
 ENV NODE_ENV=production
 
 EXPOSE 7860
 
-CMD ["node", "server.js"]
+CMD ["node", "backend/dist/backend/src/server.js"]