Add GitLab CI configuration

.gitlab-ci.yml

@@ -0,0 +1,29 @@
+image: silex/emacs:26.3-alpine-dev
+
+stages:
+  - package
+  - deploy
+
+package:
+  stage: package
+  before_script:
+    - rm -rf public/
+    - mkdir public/
+  script: >
+    emacs --batch --load package --load package-x --funcall package-initialize
+    --eval "(let ((package-archive-upload-base \"public/\"))
+              (package-upload-file \"circe-serenity.el\"))"
+  artifacts:
+    paths:
+      - public/
+
+pages:
+  stage: deploy
+  only:
+    - master
+  dependencies:
+    - package
+  script: echo "Done"
+  artifacts:
+    paths:
+      - public