Add build time to compile flags

pkg/cmd/version.go

@@ -30,6 +30,7 @@ var versionCmd = &cobra.Command{
 	Use:   "version",
 	Short: "Print the version number of Vikunja",
 	Run: func(cmd *cobra.Command, args []string) {
-		fmt.Println("Vikunja api version " + version.Version)
+		fmt.Printf("Vikunja api version %s\n", version.Version)
+		fmt.Printf("Built at %s\n", version.BuildTime)
 	},
 }

pkg/cmd/web.go

@@ -39,7 +39,7 @@ var webCmd = &cobra.Command{
 	Run: func(cmd *cobra.Command, args []string) {
 
 		// Version notification
-		log.Infof("Vikunja version %s", version.Version)
+		log.Infof("Vikunja version %s, built at %s", version.Version, version.BuildTime)
 
 		// Additional swagger information
 		swagger.SwaggerInfo.Version = version.Version

pkg/version/version.go

@@ -21,3 +21,6 @@ package version
 
 // Version sets the version to be printed to the user. Gets overwritten by "make release" or "make build" with last git commit or tag.
 var Version = "0.7"
+
+// BuildTime contains the build time of vikunja.
+var BuildTime = ""