feat(swagger): support dynamic host via EZ_SWAGGER_HOST env var

- Add ServerConfig.SwaggerHost field
- Set docs.SwaggerInfo.Host dynamically at startup
- Update docker-compose, k8s manifests, and .env.example

cmd/server/main.go

@@ -14,7 +14,7 @@ import (
 	"syscall"
 	"time"
 
-	_ "github.com/ez-api/ez-api/docs"
+	"github.com/ez-api/ez-api/docs"
 	"github.com/ez-api/ez-api/internal/api"
 	"github.com/ez-api/ez-api/internal/config"
 	"github.com/ez-api/ez-api/internal/cron"
@@ -246,6 +246,13 @@ func main() {
 		c.Next()
 	})
 
+	// 动态设置 Swagger Host
+	if cfg.Server.SwaggerHost != "" {
+		docs.SwaggerInfo.Host = cfg.Server.SwaggerHost
+	} else {
+		docs.SwaggerInfo.Host = "" // 使用相对路径
+	}
+
 	// Health Check Endpoint
 	r.GET("/health", func(c *gin.Context) {
 		status := healthService.Check(c.Request.Context())