Bumped node version. Added workflow for package publishment.

.github/workflows/publish-package.yml

@@ -0,0 +1,22 @@
+name: Publish package
+
+on:
+  push:
+    tags:
+      - '*'
+
+jobs:
+  publish-package:
+    name: Run yarn publish
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Publish new version to NPM
+        uses: actions/setup-node@v1
+        with:
+          node-version: 14.15.0
+          registry-url: 'https://registry.npmjs.org'
+      - run: yarn publish
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

docker-compose.yml

@@ -1,7 +1,7 @@
 version: '2.4'
 services:
     node:
-        image: node:11.15.0-alpine
+        image: node:14.15.0-alpine
         command: sh -c 'yarn install && yarn run test'
         working_dir: /app
         volumes: