ci: docker build based on github actions

.github/workflows/docker.yml

@@ -0,0 +1,16 @@
+name: Docker Push
+on: [push, create]
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v2
+
+    - name: Build Docker image
+      uses: mr-smithers-excellent/docker-build-push@v2
+      with:
+        image: mcuadros/ascode
+        registry: docker.io
+        username: ${{ secrets.DOCKER_USERNAME }}
+        password: ${{ secrets.DOCKER_PASSWORD }}

Dockerfile

@@ -0,0 +1,9 @@
+FROM golang:1.14.0-alpine AS builder
+WORKDIR $GOPATH/src/github.com/mcuadros/ascode
+COPY . .
+RUN GO111MODULE=on CGO_ENABLED=0 GOPROXY="https://proxy.golang.org" go build -o /bin/ascode .
+
+FROM alpine:latest  
+RUN apk --no-cache add ca-certificates
+COPY --from=builder /bin/ascode /bin/ascode
+CMD ["ascode"]