Merge pull request #33 from rekuberate-io/26-armv8-support

added missing changes in Dockerfile #26

Dockerfile

@@ -1,5 +1,7 @@
 # Build the manager binary
 FROM golang:1.18 AS builder
+ARG TARGETOS
+ARG TARGETARCH
 
 WORKDIR /workspace
 # Copy the Go Modules manifests
@@ -15,7 +17,7 @@ COPY api/ api/
 COPY controllers/ controllers/
 
 # Build
-RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -o manager main.go
+RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -a -o manager main.go
 
 # Use distroless as minimal base image to package the manager binary
 # Refer to https://github.com/GoogleContainerTools/distroless for more details