Add deployment via GitLab CI

.gitlab-ci.yml

@@ -1,3 +1,7 @@
+stages:
+  - build
+  - deploy
+
 build site:
   image: node:lts
   stage: build
@@ -8,3 +12,14 @@ build site:
   artifacts:
     paths:
       - app/dist
+
+deploy site:
+  image: instrumentisto/rsync-ssh
+  stage: deploy
+  script:
+    - mkdir ~/.ssh
+    - echo "$SSH_KNOWN_HOSTS" >> ~/.ssh/known_hosts
+    - chmod 644 ~/.ssh/known_hosts
+    - eval $(ssh-agent -s)
+    - echo "$SSH_PRIVATE_KEY" | tr -d '\r' | ssh-add -
+    - rsync -vr -e "ssh -p ${SSH_PORT}" app/dist/ "${DEPLOY_DEST}"