Docker: Add `mode` label when building docker images (#68865)

Add mode label when building docker image

pkg/build/cmd/builddocker.go

@@ -41,7 +41,7 @@ func BuildDocker(c *cli.Context) error {
 		useUbuntu)
 
 	for _, arch := range buildConfig.Docker.Architectures {
-		if _, err := docker.BuildImage(version, arch, ".", useUbuntu, shouldSave, edition); err != nil {
+		if _, err := docker.BuildImage(version, arch, ".", useUbuntu, shouldSave, edition, metadata.ReleaseMode.Mode); err != nil {
 			return cli.Exit(err.Error(), 1)
 		}
 	}

pkg/build/docker/build.go

@@ -56,7 +56,7 @@ func verifyArchive(archive string) error {
 
 // BuildImage builds a Docker image.
 // The image tag is returned.
-func BuildImage(version string, arch config.Architecture, grafanaDir string, useUbuntu, shouldSave bool, edition config.Edition) ([]string, error) {
+func BuildImage(version string, arch config.Architecture, grafanaDir string, useUbuntu, shouldSave bool, edition config.Edition, mode config.VersionMode) ([]string, error) {
 	var baseArch string
 
 	switch arch {
@@ -127,6 +127,7 @@ func BuildImage(version string, arch config.Architecture, grafanaDir string, use
 		"--no-cache",
 		"--file", "../../Dockerfile",
 		".",
+		"--label", fmt.Sprintf("mode=%s", string(mode)),
 	}
 
 	//nolint:gosec