Print Version Number on startup (#1659)

* Changed Dockerfile to get the Enviroment variable from the github actions workflow and pass it to the main.go file

Added a function in main.go to fetch the enviroment varible and to have a fallback if the env variable isnt there

Added a test for the version to use for this branch only

* Update test-version.yaml

* Update test-version.yaml

* Removed the test because its not needed when we push upstream

* Moved the version print in main.go to the Log codeblock as requested by toast-gear

Added version as issue#1161 requests.

Decided to use a docker tag structure for the userAgent string, with : being a seperator of the name and version

* Used ldflags instead like mumoshu recommended

Changed Dockerfile to use $VERSION from the workflow

Added version.go and the build package
Removed the getVersion function as we can just get the value directly

* Used ldflags instead like mumoshu recommended

Changed Dockerfile to use $VERSION from the workflow

Added version.go and the build package
Removed the getVersion function as we can just get the value directly

* * Removed the default from the go code (set it as N/A)
* Changed version from latest to dev inside makefile
* Added buildarg for version to the dockerfile in the makerfile
* Added VERSION with default dev value as arg inside dockerfile
* Cleaned up inside dockerfile

* Fix failing test

* Fix possible missing VERSION in the ARC UA suffix due to missing build arg in docker-build-push step

Co-authored-by: S8338C <viktor.lindgren@seb.se>
Co-authored-by: Yusuke Kuoka <ykuoka@gmail.com>

Makefile

@@ -4,7 +4,7 @@ else
 	NAME ?= summerwind/actions-runner-controller
 endif
 DOCKER_USER ?= $(shell echo ${NAME} | cut -d / -f1)
-VERSION ?= latest
+VERSION ?= dev
 RUNNER_VERSION ?= 2.295.0
 TARGETPLATFORM ?= $(shell arch)
 RUNNER_NAME ?= ${DOCKER_USER}/actions-runner
@@ -119,6 +119,7 @@ docker-buildx:
 	docker buildx build --platform ${PLATFORMS} \
 		--build-arg RUNNER_VERSION=${RUNNER_VERSION} \
 		--build-arg DOCKER_VERSION=${DOCKER_VERSION} \
+		--build-arg VERSION=${VERSION} \
 		-t "${NAME}:${VERSION}" \
 		-f Dockerfile \
 		. ${PUSH_ARG}