fix database url

docker-compose.yml

@@ -25,7 +25,7 @@ services:
     ports:
       - "8000:8000"
     environment:
-      DATABASE_URL: postgresql+asyncpg://trumpsignal:${POSTGRES_PASSWORD}@db:5432/trumpsignal
+      DATABASE_URL: postgresql+asyncpg://${SERVICE_USER_POSTGRES}:${SERVICE_PASSWORD_POSTGRES}@db:5432/trumpsignal
       FRONTEND_URL: ${FRONTEND_URL}
       ENCRYPTION_KEY: ${ENCRYPTION_KEY}
       AI_API_KEY: ${AI_API_KEY}