chore: updated readme

Signed-off-by: Alex Jones <alexsimonjones@gmail.com>

Dockerfile

@@ -1,5 +1,6 @@
 # Build the manager binary
-FROM golang:1.19 as builder
+FROM --platform=$BUILDPLATFORM golang:1.20.3-alpine3.16 AS builder
+
 ARG TARGETOS
 ARG TARGETARCH
 
@@ -14,14 +15,15 @@ RUN go mod download
 # Copy the go source
 COPY main.go main.go
 COPY api/ api/
+COPY pkg/ pkg/
 COPY controllers/ controllers/
 
 # Build
 # the GOARCH has not a default value to allow the binary be built according to the host where the command
 # was called. For example, if we call make docker-build in a local env which has the Apple Silicon M1 SO
 # the docker BUILDPLATFORM arg will be linux/arm64 when for Apple x86 it will be linux/amd64. Therefore,
 # by leaving it empty we can ensure that the container and binary shipped on it will have the same platform.
-RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -a -o manager main.go
+RUN CGO_ENABLED=0 GOOS=${TARGETOS} GOARCH=${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

Makefile

@@ -74,15 +74,15 @@ run: manifests generate fmt vet ## Run a controller from your host.
 .PHONY: docker-build
 docker-build: test ## Build docker image with the manager.
 	@echo "===========> Building docker image"
-	docker buildx build --build-arg=VERSION="$$(git rev-parse --short HEAD)" --build-arg=COMMIT="$$(git rev-parse --short HEAD)" --build-arg DATE="$$(date +%FT%TZ)" --platform="linux/amd64,linux/arm64" -t ${IMG} -f container/Dockerfile . --push
+	docker buildx build --build-arg=VERSION="$$(git describe --tags --abbrev=0)" --build-arg=COMMIT="$$(git rev-parse --short HEAD)" --build-arg DATE="$$(date +%FT%TZ)" --platform="linux/amd64,linux/arm64" -t ${IMG} . --push
 
 # PLATFORMS defines the target platforms for  the manager image be build to provide support to multiple
 # architectures. (i.e. make docker-buildx IMG=myregistry/mypoperator:0.0.1). To use this option you need to:
 # - able to use docker buildx . More info: https://docs.docker.com/build/buildx/
 # - have enable BuildKit, More info: https://docs.docker.com/develop/develop-images/build_enhancements/
 # - be able to push the image for your registry (i.e. if you do not inform a valid value via IMG=<myregistry/image:<tag>> then the export will fail)
 # To properly provided solutions that supports more than one platform you should use this option.
-PLATFORMS ?= linux/arm64,linux/amd64,linux/s390x,linux/ppc64le
+PLATFORMS ?= linux/arm64,linux/amd64
 .PHONY: docker-buildx
 docker-buildx: test ## Build and push docker image for the manager for cross-platform support
 	# copy existing Dockerfile and insert --platform=${BUILDPLATFORM} into Dockerfile.cross, and preserve the original Dockerfile