Build image using GitHub Actions

.github/workflows/main.yml

@@ -0,0 +1,33 @@
+name: Build Docker Image
+
+on: [push, pull_request, release]
+
+jobs:
+  main:
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Cache node modules
+        uses: actions/cache@v2
+        with:
+          path: |
+            ~/.npm
+          key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-node-
+
+      - name: Build Docker image
+        run: |
+          docker build -t cfreak/homepage-docs:latest .
+
+      - name: Before Deploy
+        if: github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/tags')
+        run: |
+          docker logout
+          docker login -u "${{ secrets.DOCKER_USERNAME }}" -p "${{ secrets.DOCKER_PASSWORD }}"
+
+      - name: Deploy master branch as latest
+        if: github.ref == 'refs/heads/master'
+        run: |
+          docker push cfreak/homepage-docs:latest