PostgreSQL statt SQLite: eigener DB-Container in Compose

backend/config/database.js

@@ -1,20 +1,25 @@
 const { Sequelize } = require('sequelize');
 
-const sequelize = new Sequelize({
-  dialect: 'sqlite',
-  storage: process.env.DB_PATH || './database.sqlite',
-  logging: false,
-});
+const sequelize = new Sequelize(
+  process.env.DB_NAME || 'webcad',
+  process.env.DB_USER || 'webcad',
+  process.env.DB_PASSWORD || 'webcad',
+  {
+    host: process.env.DB_HOST || 'postgres',
+    port: process.env.DB_PORT || 5432,
+    dialect: 'postgres',
+    logging: false,
+  }
+);
 
 const connectDB = async () => {
   try {
     await sequelize.authenticate();
-    console.log('Database connected.');
+    console.log('PostgreSQL connected.');
     await sequelize.sync();
     console.log('Database synced.');
   } catch (err) {
-    console.error('Database connection error:', err);
-    // Retry after 5s
+    console.error('DB connection error:', err.message);
     setTimeout(connectDB, 5000);
   }
 };