fix: echo

Dockerfile

@@ -1,27 +1,26 @@
 ARG GOLANG_VERSION
-ARG TARGETARCH
 
 # FROM golang:$GOLANG_VERSION as builder
 FROM ghcr.io/dopos/golang-alpine:v1.16.10-alpine3.14.2 as builder
+ARG TARGETARCH
 
 WORKDIR /opt/app
 
 # Cached layer
 COPY ./go.mod ./go.sum ./
 
+RUN echo "Build for arch $TARGETARCH"
+
 # Sources dependent layer
 COPY ./ ./
 RUN CGO_ENABLED=0 go test -tags test -covermode=atomic -coverprofile=coverage.out ./...
 RUN CGO_ENABLED=0 go build -ldflags "-X main.version=`git describe --tags --always`" -a ./cmd/webtail
 
 FROM scratch
-ARG TARGETARCH
 
 MAINTAINER Alexey Kovrizhkin <[email protected]>
 LABEL org.opencontainers.image.description "Tail [log]files via web[sockets]"
 
-RUN echo "Build for arch $TARGETARCH"
-
 VOLUME /data
 WORKDIR /
 COPY --from=builder /opt/app/webtail .