Docker hub workflow (#2)

* Add dockerhub workflow

* Add check

* Remove pull request trigger

.github/workflows/main.yml

@@ -0,0 +1,27 @@
+name: CI
+
+on:
+  push:
+    branches: [ master ]
+
+jobs:
+  build:
+    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.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Build and push
+        id: docker_build
+        uses: docker/build-push-action@v2
+        with:
+          push: ${{ github.ref == 'refs/heads/master' }}
+          tags: adikso/minecraft-log4j-honeypot:latest
+      - name: Image digest
+        run: echo ${{ steps.docker_build.outputs.digest }}