chore: add header to generated Caddyfile that it's autogenerated

internal/machine/caddyconfig/caddyfile.go

@@ -17,7 +17,11 @@ import (
 	"github.com/psviderski/uncloud/pkg/api"
 )
 
-const caddyfileTemplate = `http:// {
+const (
+	caddyfileHeader = `# This file is autogenerated by Uncloud. Do not edit manually.
+# Any manual changes will be overwritten on the next update.
+`
+	caddyfileTemplate = `http:// {
 	handle {{.VerifyPath}} {
 		respond "{{.VerifyResponse}}" 200
 	}
@@ -47,6 +51,7 @@ https://{{$hostname}} {
 	log
 }{{end}}
 `
+)
 
 // CaddyfileGenerator generates a Caddyfile configuration for the Caddy reverse proxy.
 type CaddyfileGenerator struct {
@@ -188,7 +193,7 @@ func (g *CaddyfileGenerator) Generate(ctx context.Context, records []store.Conta
 		}
 	}
 
-	return caddyfile, nil
+	return caddyfileHeader + "\n" + caddyfile, nil
 }
 
 func (g *CaddyfileGenerator) generateBaseFromPorts(containers []api.ServiceContainer) (string, error) {