ci: build on custom infrastructure

.gitlab-ci.yml

@@ -10,6 +10,8 @@ checks:
   script:
     - go fmt $(go list ./...)
     - go vet $(go list ./...)
+  tags:
+    - docker
 
 code coverage:
   stage: test
@@ -26,6 +28,8 @@ code coverage:
     paths:
       - coverage.cov
       - coverage.html
+  tags:
+    - docker
 
 codecov.io:
   stage: test
@@ -42,6 +46,8 @@ codecov.io:
   rules:
     - if: $CODECOV_TOKEN
       when: on_success
+  tags:
+    - docker
 
 # stage "sonarcloud" is only needed because of this issue:
 # https://gitlab.com/gitlab-org/gitlab/-/issues/30632
@@ -61,6 +67,8 @@ sonarcloud-check:
       - .sonar/cache
   script:
     - sonar-scanner
+  tags:
+    - docker
   allow_failure: true
 
 # build template
@@ -71,6 +79,8 @@ sonarcloud-check:
   dependencies: []
   script:
     - go build .
+  tags:
+    - docker
 
 darwin-amd64:
   extends: .compile