build: isolate go module proxy setting

docker-compose.yml

@@ -45,13 +45,15 @@ services:
       context: .
       dockerfile: Dockerfile
       args:
-        GOPROXY: ${GOPROXY:-https://goproxy.cn,direct}
+        GOPROXY: ${GO_MODULE_PROXY:-https://goproxy.cn,direct}
         HTTP_PROXY: ${HTTP_PROXY:-}
         HTTPS_PROXY: ${HTTPS_PROXY:-}
         NO_PROXY: ${NO_PROXY:-}
         http_proxy: ${HTTP_PROXY:-}
         https_proxy: ${HTTPS_PROXY:-}
         no_proxy: ${NO_PROXY:-}
+      extra_hosts:
+        - "host.docker.internal:host-gateway"
     container_name: crypto-hermes-market-gateway
     depends_on:
       postgres:
@@ -73,6 +75,8 @@ services:
     volumes:
       - ./config:/app/config:ro
       - ./logs:/app/logs
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
     # SIGTERM → 等 app 内置 10s graceful shutdown（fiber.ShutdownWithContext）
     # + cron 任务结束的缓冲 = 30s。超时后 docker 发 SIGKILL。
     stop_grace_period: 30s