add docker image armv7

.github/workflows/docker-image-armv7.yml

@@ -0,0 +1,33 @@
+name: Docker image armv7
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    
+    - 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.DOCKER_USER }}
+        password: ${{ secrets.DOCKER_PASSWORD }}
+      
+    - name: Build and push
+      id: docker_build
+      uses: docker/build-push-action@v2
+      with:
+        push: true
+        tags: mkaczanowski/pastebin:armv7
+        file: Dockerfile.armv7