docsbuilding: separate builds per environment

Signed-off-by: Patrick Uiterwijk <patrick@puiterwijk.org>

roles/openshift-apps/docsbuilding/templates/buildconfig.yml

@@ -11,6 +11,7 @@ spec:
   source:
     git:
       uri: "https://pagure.io/fedora-docs/docs-fp-o.git"
+      ref: "{{ env_short }}"
     contextDir: "build-scripts"
   output:
     to:

roles/openshift-apps/docsbuilding/templates/cron.yml

@@ -15,6 +15,9 @@ spec:
           containers:
           - name: build
             image: docker-registry.default.svc:5000/docsbuilding/builder:latest
+            env:
+            - name: BUILD_ENV
+              value: "{{ env_short }}"
             volumeMounts:
             - name: build-output
               mountPath: /antora/output