Add deployment environment names

See https://docs.gitlab.com/ee/ci/environments/

This enables GitLab to

• display some nice extra links with every deploy that we can click on to check out the new deployment after it's done
• allow us to trigger a deployment of an older version (rollback) if a new one is garbage
• later hopefully: together with reading metrics from Prometheus allow auto-rollback

For this to work, @jcalderone please set up two environments as per the GitLab docs here:

In the UI:

Go to the project’s Operations > Environments page. Select New environment. Enter a name and external URL. Select Save.

.gitlab-ci.yml

@@ -29,14 +29,20 @@ deploy-to-staging:
   stage: "deploy"
   only:
     - "staging"
+  environment:
+    name: "staging"
+    url: "https://privatestorage-staging.com/"
   script:
-    - echo -n "Hello $GITLAB_USER_LOGIN from $CI_JOB_NAME. I was triggered by $CI_PIPELINE_SOURCE "
-    - echo "and would like to deploy the $CI_COMMIT_BRANCH branch to the staging environment."
+    - echo "Hello $GITLAB_USER_LOGIN from $CI_JOB_NAME. I was triggered by $CI_PIPELINE_SOURCE "
+    - echo "and would like to deploy the $CI_COMMIT_BRANCH branch to the $CI_ENVIRONMENT_NAME environment."
 
 deploy-to-production:
   stage: "deploy"
   only:
     - "production"
+  environment:
+    name: "production"
+    url: "https://privatestorage.io/"
   script:
-    - echo -n "Hello $GITLAB_USER_LOGIN from $CI_JOB_NAME. I was triggered by $CI_PIPELINE_SOURCE "
-    - echo "and would like to deploy the $CI_COMMIT_BRANCH branch to the production environment."
+    - echo "Hello $GITLAB_USER_LOGIN from $CI_JOB_NAME. I was triggered by $CI_PIPELINE_SOURCE "
+    - echo "and would like to deploy the $CI_COMMIT_BRANCH branch to the $CI_ENVIRONMENT_NAME environment."