Security improvements and infrastructure updates

.env.example

@@ -0,0 +1,12 @@
+# Database Configuration
+# These environment variables are used by all services to connect to the database
+# For production, use strong passwords and keep this file secure
+
+DB_USER=postgres
+DB_PASSWORD=postgres
+DB_HOST=db
+DB_PORT=5432
+DB_NAME=postgres
+
+# Redis Configuration (optional)
+REDIS_HOST=redis