Initial GitLab CI

Signed-off-by: Valentin Popov <info@valentineus.link>

.editorconfig

@@ -14,3 +14,7 @@ trim_trailing_whitespace = true
 [*.json]
 indent_size = 2
 indent_style = space
+
+[*.yml]
+indent_size = 2
+indent_style = space

.gitlab-ci.yml

@@ -0,0 +1,19 @@
+image: "node:latest"
+
+cache:
+  paths:
+    - node_modules/
+
+job-publish:
+  only:
+    - tags
+
+  before_script:
+    - curl -o- -L https://yarnpkg.com/install.sh | bash
+    - export PATH="$HOME/.yarn/bin:$HOME/.config/yarn/global/node_modules/.bin:$PATH"
+
+  script:
+    - yarn install
+    - yarn run build
+    - echo "//registry.npmjs.org/:_authToken=${NPM_TOKEN}" > .npmrc
+    - npm publish