Update Prometheus database URL to use the correct hostname

Author: dcloud347

example.env

@@ -36,7 +36,7 @@ PROMETHEUS_TEMPERATURE=0.3
 PROMETHEUS_MAX_OUTPUT_TOKENS=15000
 
 # Database settings
-PROMETHEUS_DATABASE_URL=postgresql://postgres:password@localhost:5432/postgres?sslmode=disable
+PROMETHEUS_DATABASE_URL=postgresql://postgres:password@postgres:5432/postgres?sslmode=disable
 
 # JWT settings
 PROMETHEUS_JWT_SECRET_KEY=your_jwt_secret_key