Add github workflow to deploy docker image

.github/workflows/deploy.yml

@@ -0,0 +1,28 @@
+name: Deploy
+
+on:
+  push:
+    branches: [ "master", "main" ]
+  pull_request:
+    branches: [ "master", "main" ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Login to ghcr.io
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Execute image build and push
+        run: |
+          docker build -t ghcr.io/pcvolkmer/docker-wireguard-boringtun .
+          docker push ghcr.io/pcvolkmer/docker-wireguard-boringtun