Add environment configuration files to .gitignore (#2830)

* Add environment configuration files to .gitignore

* Delete config files from repo

* Refactor release cb file to delete config file lines from gitignore

* Reorder env files

* Add README for config files

release/cloudbuild-release.yaml

@@ -42,6 +42,20 @@ steps:
     rm -rf .git && rm -rf nomulus-internal/.git
     cp -rf nomulus-internal/* .
     rm -rf nomulus-internal
+# Remove environment configs from .gitignore
+- name: 'gcr.io/cloud-builders/git'
+  entrypoint: /bin/bash
+  args:
+  - -c
+  - |
+    set -e
+    sed -i \
+        -e '\#core/src/main/java/google/registry/config/files/nomulus-config-alpha.yaml#d' \
+        -e '\#core/src/main/java/google/registry/config/files/nomulus-config-crash.yaml#d' \
+        -e '\#core/src/main/java/google/registry/config/files/nomulus-config-production.yaml#d' \
+        -e '\#core/src/main/java/google/registry/config/files/nomulus-config-qa.yaml#d' \
+        -e '\#core/src/main/java/google/registry/config/files/nomulus-config-sandbox.yaml#d' \
+        .gitignore
 # Build the builder image and pull the base images, them upload them to GCR.
 - name: 'gcr.io/cloud-builders/docker'
   entrypoint: /bin/bash