Update golang Docker tag to v1.20.4

.github/workflows/build-docker-image.yaml

@@ -24,7 +24,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Build and push
         id: docker_build
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v4
         with:
           push: true
           platforms: linux/amd64,linux/arm64,linux/arm/v7

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.18.4-alpine3.16 as build
+FROM golang:1.20.4-alpine3.16 as build
 WORKDIR /build
 COPY . .
 RUN go get -d -v .