feat: bootstrap control plane app skeleton

internal/app/bootstrap.go

@@ -0,0 +1,16 @@
+package app
+
+import (
+	"context"
+
+	"sub2api-cn-relay-manager/internal/config"
+)
+
+func Bootstrap(_ context.Context) (*Server, error) {
+	cfg, err := config.LoadStartupFromEnv()
+	if err != nil {
+		return nil, err
+	}
+
+	return NewServer(cfg.Server.ListenAddr, nil), nil
+}