Added deploy stage in gitlab-ci

Signed-off-by: Louis Vallat <louis@louis-vallat.xyz>

.gitlab-ci.yml

@@ -4,6 +4,7 @@ services:
 
 stages:
   - release
+  - deploy
 
 # Disable the Gradle daemon for Continuous Integration servers as correctness
 # is usually a priority over speed in CI environments. Using a fresh
@@ -31,3 +32,13 @@ release-master:
     - docker push $CONTAINER_RELEASE_IMAGE
   only:
     - master
+
+deploy:
+  stage: deploy
+  before_script:
+    - eval $(ssh-agent -s)
+    - echo "$SSH_PRIVATE_KEY" | tr -d '\r' | ssh-add -
+    - mkdir -p ~/.ssh
+    - chmod 700 ~/.ssh
+  script:
+    - ssh -o StrictHostKeyChecking=no -p $SSH_PORT $SSH_DESTINATION "cd $PATH_TO_APPLICATION; $UPGRADE_COMMAND;"