Merge pull request #33 from bmf-san/fix/build-opt

Fix build option

app/Dockerfile

@@ -2,19 +2,19 @@ FROM golang:1.17.1-alpine as builder
 
 WORKDIR /go/gobel-client-example/app
 
+ARG TARGETPLATFORM
+ARG TARGETOS
+ARG TARGETARCH
+
 COPY . .
 
 RUN apk update && \
     apk upgrade && \
     apk add --no-cache libc-dev gcc git openssh openssl bash
 
-ENV CGO_ENABLED=0
-ENV GOOS=linux
-ENV GOARCH=${TARGETARCH}
-
-RUN go build -o app
+RUN CGO_ENABLED=0 GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -o app
 
-FROM --platform=$BUILDPLATFORM  alpine
+FROM --platform=$TARGETPLATFORM alpine
 
 COPY --from=builder /go/gobel-client-example/app ./