Add support to publish docker images to ghcr over dockerhub

Update the goreleaser config to point to ghcr

.goreleaser.yml

@@ -37,9 +37,9 @@ dockers:
       - gocd-cli
     skip_push: false
     image_templates:
-      - "basnik/gocd-cli:latest"
-      - "basnik/gocd-cli:{{ .Tag }}"
-      - "basnik/gocd-cli:{{ .Tag }}-{{ .Env.GOVERSION }}"
+      - "ghcr.io/nikhilsbhat/gocd-cli:latest"
+      - "ghcr.io/nikhilsbhat/gocd-cli:{{ .Tag }}"
+      - "ghcr.io/nikhilsbhat/gocd-cli:{{ .Tag }}-{{ .Env.GOVERSION }}"
     dockerfile: Dockerfile
 
 archives:

Makefile

@@ -68,4 +68,7 @@ generate.document: ## generates cli documents using 'github.com/spf13/cobra/doc'
 	@go generate github.com/nikhilsbhat/gocd-cli/docs
 
 test: ## runs test cases
-	@go test ./... -mod=vendor -coverprofile cover.out && go tool cover -html=cover.out -o cover.html && open cover.html
+	@go test ./... -mod=vendor -coverprofile cover.out && go tool cover -html=cover.out -o cover.html && open cover.html
+
+docker.login: ## Should login to ghcr docker registry.
+	@echo "${GITHUB_TOKEN}" | docker login ghcr.io -u nikshilsbhat --password-stdin

README.md

@@ -50,6 +50,15 @@ Updated documentation on all available commands and flags can be found [here](ht
 * Recommend installing released versions. Release binaries are available on the [releases](https://github.com/nikhilsbhat/gocd-cli/releases) page and docker from [here](https://hub.docker.com/repository/docker/basnik/gocd-cli).
 * Can always build it locally by running `go build` against cloned repo.
 
+#### Docker
+
+Latest version of docker images are published to [ghcr.io](https://github.com/nikhilsbhat/gocd-cli/pkgs/container/gocd-cli), all available images can be found there. </br>
+
+```bash
+docker pull ghcr.io/nikhilsbhat/gocd-cli:latest
+docker pull ghcr.io/nikhilsbhat/gocd-cli:<github-release-tag>
+```
+
 ### Note
 
 * The command `gocd-cli pipeline validate-syntax` would use GoCD's plugin binary to validate the pipeline syntax.