ci: get swag/gen & swag command

.gitlab-ci.yml

@@ -81,6 +81,8 @@ build:
 build-openapi-2-scheme:
   stage: build
   script:
+    - go get github.com/swaggo/swag/gen@v1.16.3
+    - go get github.com/swaggo/swag/cmd/swag@v1.16.3
     - go install github.com/swaggo/swag/cmd/swag
     - make api-docs
   rules: *feature-rules