Add tests and automatic image publishing

A couple of github action files have been added that (hopefully)
run tests and CI for the docker images on push to dev and master.

.dockerignore

@@ -2,6 +2,7 @@
 **/.dockerignore
 **/.env
 **/.git
+**/.github
 **/.gitignore
 **/.project
 **/.settings

.github/dependabot.yml

@@ -0,0 +1,7 @@
+version: 2
+updates:
+  # Maintain dependencies for GitHub Actions
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"

.github/workflows/docker-image-dev.yml

@@ -0,0 +1,51 @@
+name: Docker Dev Image CI
+
+on:
+  push:
+    branches: [ dev ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      # Checkout the Repo
+      - uses: actions/checkout@v2
+
+      # Install Node 16
+      - name: Setup Node
+        uses: actions/setup-node@v1
+        with:
+          node-version: 16
+          
+      # Avoid running prepublish script
+      - run: npm set-script prepublish ""
+      
+      # Install dependencies
+      - run: npm install
+
+      # Run tests
+      - run: npm test
+
+  build:
+    needs: test
+    runs-on: ubuntu-latest
+
+    steps:
+      -
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      -
+        name: Login to DockerHub
+        uses: docker/login-action@v1 
+        with:
+          username: ${{ secrets.DOCKER_HUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_TOKEN }}
+      -
+        name: Build and push
+        uses: docker/build-push-action@v2
+        with:
+          push: true
+          tags: wolvan/poll.horse:dev

.github/workflows/docker-image-master.yml

@@ -0,0 +1,52 @@
+name: Docker Image CI
+
+on:
+  push:
+    branches: [ master ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      # Checkout the Repo
+      - uses: actions/checkout@v2
+
+      # Install Node 16
+      - name: Setup Node
+        uses: actions/setup-node@v1
+        with:
+          node-version: 16
+          
+      # Avoid running prepublish script
+      - run: npm set-script prepublish ""
+      
+      # Install dependencies
+      - run: npm install
+
+      # Run tests
+      - run: npm test
+
+  build:
+    if: startsWith(github.event.ref, 'refs/tags')
+    needs: test
+    runs-on: ubuntu-latest
+
+    steps:
+      -
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      -
+        name: Login to DockerHub
+        uses: docker/login-action@v1 
+        with:
+          username: ${{ secrets.DOCKER_HUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_TOKEN }}
+      -
+        name: Build and push
+        uses: docker/build-push-action@v2
+        with:
+          push: true
+          tags: wolvan/poll.horse:latest

.github/workflows/run-tests.yml

@@ -0,0 +1,28 @@
+name: Run tests
+
+on:
+  push:
+    branches: [ dev, master ]
+  pull_request:
+    branches: [ dev ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [10.x, 12.x, 14.x, 15.x, 16.x]
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: Install dependencies
+        run: npm set-script prepublish ""
+      - run: npm ci
+      - run: npm run build --if-present
+      - run: npm test