Use offical image provided by crdoc

https://github.com/fybrik/crdoc/pull/108

.gitlab-ci.yml

@@ -73,26 +73,35 @@ test-docs-links:
     - build-docs
   script: bundle exec htmlproofer --assume-extension --allow_hash_href --url-ignore "/favicon.ico" ./_site
 
+build-docs-crds:
+  stage: build
+  image: ghcr.io/fybrik/crdoc:0.6.0
+  script: "--resources theodolite/crd/ --template docs/api-reference/crds.tmpl --output docs/api-reference/crds.ref.md"
+  artifacts:
+    paths:
+      - docs/api-reference/crds.ref.md
+    expire_in: 1 week
+  rules:
+    - changes:
+      - docs/api-reference/crds.tmpl
+      - theodolite/crd/**/*
+    - when: manual
+      allow_failure: true
+
 test-docs-crds-regression:
   stage: test
-  image: golang
+  needs:
+    - build-docs-crds
+  image: alpine:3.15
   before_script:
     - cd docs
-    - go install fybrik.io/crdoc@latest
   script:
-    - crdoc --resources ../theodolite/crd/ --template api-reference/crds.tmpl  --output api-reference/crds.ref.md
     - cmp api-reference/crds.md api-reference/crds.ref.md
   artifacts:
     when: on_failure
     paths:
       - docs/api-reference/crds.ref.md
     expire_in: 1 week
-  rules:
-    - changes:
-      - docs/api-reference/crds.tmpl
-      - theodolite/crd/**/*
-    - when: manual
-      allow_failure: true
 
 
 # Theodolite Helm Chart