docs: use variabilized GitLab server FQDN in CI/CD component reference URLs

README.md

@@ -16,7 +16,7 @@ Add the following to your `.gitlab-ci.yml`:
 ```yaml
 include:
   # 1: include the component
-  - component: gitlab.com/to-be-continuous/kubernetes/gitlab-ci-k8s@6.3.0
+  - component: $CI_SERVER_FQDN/to-be-continuous/kubernetes/gitlab-ci-k8s@6.3.0
     # 2: set/override component inputs
     inputs:
       # ⚠ this is only an example
@@ -532,12 +532,12 @@ With:
 ```yaml
 include:
   # main template
-  - component: gitlab.com/to-be-continuous/kubernetes/gitlab-ci-k8s@6.3.0
+  - component: $CI_SERVER_FQDN/to-be-continuous/kubernetes/gitlab-ci-k8s@6.3.0
     inputs:
       # ⚠ oc-container image (includes required curl)
       kubectl-image: registry.hub.docker.com/docker.io/appuio/oc:v4.14
   # Vault variant
-  - component: gitlab.com/to-be-continuous/kubernetes/gitlab-ci-k8s-vault@6.3.0
+  - component: $CI_SERVER_FQDN/to-be-continuous/kubernetes/gitlab-ci-k8s-vault@6.3.0
     inputs:
       # audience claim for JWT
       vault-oidc-aud: "https://vault.acme.host"
@@ -599,9 +599,9 @@ With a common default `GCP_OIDC_PROVIDER` and `GCP_OIDC_ACCOUNT` configuration f
 ```yaml
 include:
   # main template
-  - component: gitlab.com/to-be-continuous/kubernetes/gitlab-ci-k8s@6.3.0
+  - component: $CI_SERVER_FQDN/to-be-continuous/kubernetes/gitlab-ci-k8s@6.3.0
   # Google Cloud variant
-  - component: gitlab.com/to-be-continuous/kubernetes/gitlab-ci-k8ss-gcp@6.3.0
+  - component: $CI_SERVER_FQDN/to-be-continuous/kubernetes/gitlab-ci-k8ss-gcp@6.3.0
     inputs:
       # common OIDC config for non-prod envs
       gcp-oidc-provider: "projects/<gcp_nonprod_proj_id>/locations/global/workloadIdentityPools/<pool_id>/providers/<provider_id>"