Use multi-stage docker build

Author: Nikos410

.github/workflows/release.yml

@@ -51,14 +51,6 @@ jobs:
           git tag v${{ steps.release-version.outputs.release_version }}
           git push https://Nikos410:${{ secrets.GITHUB_TOKEN }}@github.com/partyoffice/spotifete.git v${{ steps.release-version.outputs.release_version }}
 
-      - name: Set up Go
-        uses: actions/setup-go@v2
-        with:
-          go-version: 1.17
-
-      - name: Build executable
-        run: CGO_ENABLED=0 go build -v -o ./ ./...
-
       - name: Login to Docker Hub
         uses: docker/login-action@v1
         with:

Dockerfile

@@ -1,12 +1,17 @@
-FROM alpine:3.14
+FROM golang:1.17-alpine AS builder
 
-WORKDIR /opt/spotifete
+WORKDIR /go/src/github.com/partyoffice/spotifete
+COPY . .
+
+ENV CGO_ENABLED=0
+RUN go build -v -o ./ ./...
 
-COPY ./spotifete /opt/spotifete/spotifete
-COPY ./resources /opt/spotifete/resources
+FROM alpine:latest
 
+WORKDIR /opt/spotifete
+
+COPY --from=builder /go/src/github.com/partyoffice/spotifete ./
 RUN chmod +x /opt/spotifete/spotifete
 
 EXPOSE 8410
-
 CMD ["/opt/spotifete/spotifete"]