Add GitHub Action support for Docker builds

Author: darnfish

.github/workflows/dockerimage.yml

@@ -0,0 +1,18 @@
+name: Master CI
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2.0.0
+      - name: Build and Push Dockerfile
+        uses: matootie/github-docker@v2.0.0
+        with:
+          imageName: ${{ github.event.repository.name }}-master
+          accessToken: ${{ secrets.GITHUB_TOKEN }}