Add test image

.github/workflows/docker-build.yml

@@ -1,17 +1,23 @@
 on:
   push:
     branches:
-      - master
+      - 'master'
+    paths-ignore:
+      - '**.md'
+      - 'docs'
+    tags:
+      - 'v*.*.*'
   pull_request:
     branches:
-      - master
+      - 'master'
+      - 'docs'
 name: docker-build
 jobs:
   build:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout the code
-        uses: actions/checkout@v1
+        uses: actions/checkout@v2
 
       - name: Dockerhub login
         env:
@@ -36,13 +42,20 @@ jobs:
         uses: crazy-max/ghaction-docker-buildx@v1
         with:
           buildx-version: latest
+          qemu-version: latest
 
       - name: Build and push docker image
-        env:
-          DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
         run: |
           docker buildx build --platform ${{ steps.prepare.outputs.docker_platforms }} \
           --output "type=image,push=true" \
           --tag "${{ steps.prepare.outputs.docker_image }}:${{ steps.prepare.outputs.version }}" \
           --tag "${{ steps.prepare.outputs.docker_image }}:latest" \
-          --file Dockerfile .
+          --file Dockerfile .
+
+  test:
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+      - name: Test docker image
+        run: |
+          docker run --rm --entrypoint /bin/sh ${{ secrets.DOCKER_USERNAME }}/trojan-go trojan-go --version