Update Dockerfile

Dockerfile

@@ -1,8 +1,9 @@
+# syntax=docker/dockerfile:1
 FROM node:20-slim
 
 WORKDIR /app
 
-RUN cat << EOF > package.json
+COPY <<EOF /app/package.json
 {
   "name": "gemini-proxy-server",
   "version": "1.0.0",
@@ -20,7 +21,7 @@ EOF
 
 RUN npm install --only=production
 
-RUN cat << EOF > index.js
+COPY <<EOF /app/index.js
 const express = require('express');
 const cors = require('cors');
 const axios = require('axios');
@@ -55,7 +56,7 @@ app.post('/api/generate', async (req, res) => {
 
     try {
         const apiKey = getRandomApiKey();
-        const apiUrl = `\${API_URL_BASE}/\${MODEL_ID}:streamGenerateContent?key=\${apiKey}`;
+        const apiUrl = `${API_URL_BASE}/${MODEL_ID}:streamGenerateContent?key=${apiKey}`;
 
         const requestBody = {
             contents: [{
@@ -86,7 +87,7 @@ app.post('/api/generate', async (req, res) => {
 });
 
 app.listen(PORT, () => {
-    console.log(`Server berjalan di http://localhost:\${PORT}`);
+    console.log(`Server berjalan di http://localhost:${PORT}`);
 });
 EOF