Rename Helm chart and Docker image and move to GHCR (#233)

This change does a few things, none of these are breaking.

It changes the registry from Docker Hub to GHCR, as we dont have the
same rate limiting issues with unauthenticated pulls.

It changes the release process to push the Helm chart as an OCI artifact
removing the need for GH pages.

It renames both the image and chart from kubernetes-operator to
netbird-operator. This name is cleaner and easier for people to
understand in a sea of Helm charts. Funnily enough this is not a
breaking change as the release name is used and not the chart name. So
in place upgrades just work.

Fixes #207

Signed-off-by: Philip Laine <philip.laine@gmail.com>

Makefile

@@ -10,13 +10,13 @@ else
 GOBIN = $(shell go env GOBIN)
 endif
 
-IMG_REGISTRY ?= docker.io
-IMG_REPOSITORY ?= netbirdio/kubernetes-operator
+IMG_REGISTRY ?= ghcr.io
+IMG_REPOSITORY ?= netbirdio/netbird-operator
 IMG_TAG ?= dev
 IMG_REF := $(IMG_REGISTRY)/$(IMG_REPOSITORY):$(IMG_TAG)
 
 .PHONY: generate
-generate: api/v1/zz_generated.deepcopy.go api/v1alpha1/zz_generated.deepcopy.go pkg/applyconfigurations helm/kubernetes-operator/crds docs/api-reference.md
+generate: api/v1/zz_generated.deepcopy.go api/v1alpha1/zz_generated.deepcopy.go pkg/applyconfigurations charts/netbird-operator/crds docs/api-reference.md
 
 api/v1/zz_generated.deepcopy.go api/v1alpha1/zz_generated.deepcopy.go: $(shell find api -not -name 'zz_generated*') hack/boilerplate.go.txt
 	@go tool controller-gen object:headerFile="hack/boilerplate.go.txt" paths="./..."
@@ -25,9 +25,9 @@ pkg/applyconfigurations: $(shell find api -not -name 'zz_generated*') hack/boile
 	@go tool controller-gen applyconfiguration:headerFile="hack/boilerplate.go.txt" object:headerFile="hack/boilerplate.go.txt" paths="./..."
 	@touch pkg/applyconfigurations
 
-helm/kubernetes-operator/crds: $(shell find api)
-	@go tool controller-gen crd paths="./..." output:crd:artifacts:config=helm/kubernetes-operator/crds
-	@touch helm/kubernetes-operator/crds
+charts/netbird-operator/crds: $(shell find api)
+	@go tool controller-gen crd paths="./..." output:crd:artifacts:config=charts/netbird-operator/crds
+	@touch charts/netbird-operator/crds
 
 docs/api-reference.md: $(shell find api) docs/.crd-ref-docs.yaml
 	@go tool crd-ref-docs --log-level error --output-path docs/api-reference.md --renderer markdown --source-path api/v1alpha1 --config docs/.crd-ref-docs.yaml
@@ -51,29 +51,29 @@ bin/linux-%/netbird-operator: $(shell find api cmd internal pkg) go.mod go.sum
 
 .PHONY: build-image
 build-image: build
-	@docker buildx build -t ${IMG_REF} .
+	@DOCKER_BUILDKIT=1 docker build -t ${IMG_REF} .
 	@echo ${IMG_REF}
 
 .PHONY: build-image-multiarch
 build-image-multiarch: generate bin/linux-amd64/netbird-operator bin/linux-arm64/netbird-operator
-	@docker buildx build --platform linux/amd64,linux/arm64 -t ${IMG_REF} .
+	@DOCKER_BUILDKIT=1 docker build --platform linux/amd64,linux/arm64 -t ${IMG_REF} .
 	@echo ${IMG_REF}
 
 ## Generate a consolidated YAML with CRDs and deployment.
 .PHONY: build-installer
 build-installer: generate
 	mkdir -p manifests
-	helm template --include-crds kubernetes-operator helm/kubernetes-operator > manifests/install.yaml
+	helm template --include-crds netbird-operator charts/netbird-operator > manifests/install.yaml
 
 ##@ Deployment
 
 .PHONY: install
 install: generate
-	kubectl apply --server-side -f helm/kubernetes-operator/crds
+	kubectl apply --server-side -f charts/netbird-operator/crds
 
 .PHONY: uninstall
 uninstall:
-	kubectl delete -f helm/kubernetes-operator/crds
+	kubectl delete -f charts/netbird-operator/crds
 
 run: install
 	kubectl create namespace netbird --dry-run=client -o yaml | kubectl apply -f -