add github action

.github/workflows/docker-build.yml

@@ -0,0 +1,25 @@
+name: Build and Push Docker Image
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v1
+        with:
+          username: luki42
+          password: ${{ secrets.DOCKERHUB_PASSWORD }}
+
+      - name: Build and push Docker image
+        run: |
+          docker build -t luki42/aurcache:latest .
+          docker push luki42/aurcache:latest