Add checksum config to GoReleaser and set CLI version info

Author: jmylchreest

.goreleaser.yml

@@ -59,6 +59,11 @@ archives:
       - README.md
       - contrib/systemd/keylightd.service
 
+checksum:
+  name_template: "{{ .ProjectName }}_{{ .Version }}_checksums.txt"
+  extra_files:
+    - glob: ./artifacts/keylightd-tray/*.tar.gz
+
 changelog:
   sort: asc
   filters:

cmd/keylightd/main.go

@@ -25,8 +25,9 @@ var (
 
 func main() {
 	rootCmd := &cobra.Command{
-		Use:   "keylightd",
-		Short: "Key Light Daemon",
+		Use:     "keylightd",
+		Short:   "Key Light Daemon",
+		Version: fmt.Sprintf("%s (commit: %s, built: %s)", version, commit, buildDate),
 		RunE: func(cmd *cobra.Command, args []string) error {
 			v := viper.New()
 			v.SetEnvPrefix("KEYLIGHT")