Align downstream dockerfile with the upstream one (#557)

* Align downstream dockerfile with the upstream one

* Update Dockerfile.downstream

Co-authored-by: Julien Pinsonneau <[email protected]>

---------

Co-authored-by: Julien Pinsonneau <[email protected]>

Author: OlivierCazade

Dockerfile.downstream

@@ -1,27 +1,30 @@
+ARG TARGETARCH
+ARG COMMIT
+
 # Build the manager binary
-FROM brew.registry.redhat.io/rh-osbs/openshift-golang-builder:v1.23 as builder
+FROM --platform=linux/$TARGETARCH brew.registry.redhat.io/rh-osbs/openshift-golang-builder:v1.23 as builder
 
+ARG TARGETARCH=amd64
 ARG VERSION="unknown"
 ARG COMMIT
 
 WORKDIR /opt/app-root
 
 # Copy the go manifests and source
-COPY .git/ .git/
 COPY bpf/ bpf/
 COPY cmd/ cmd/
 COPY pkg/ pkg/
 COPY vendor/ vendor/
 COPY go.mod go.mod
 COPY go.sum go.sum
-COPY Makefile Makefile
-COPY .mk/ .mk/
 
 # Build
-RUN make compile
+RUN GOARCH=$TARGETARCH go build -ldflags "-X 'main.buildVersion=${VERSION}-${COMMIT}' -X 'main.buildDate=`date +%Y-%m-%d\ %H:%M`'" -mod vendor -a -o bin/netobserv-ebpf-agent cmd/netobserv-ebpf-agent.go
 
 # Create final image from minimal + built binary
-FROM registry.access.redhat.com/ubi9/ubi-minimal:9.5-1738816775
+FROM --platform=linux/$TARGETARCH registry.access.redhat.com/ubi9/ubi-minimal:9.5-1738816775
+ARG COMMIT
+
 WORKDIR /
 COPY --from=builder /opt/app-root/bin/netobserv-ebpf-agent .
 USER 65532:65532