refactor: abstract port number into a var

distribusi.go

@@ -32,6 +32,9 @@ var Version string
 // Commit is the current commit of distribusi-go
 var Commit string
 
+// port is the web server port
+var port = ":3000"
+
 // exiftooInstalled tells us if the exiftool binary is installed or not.
 var exiftoolInstalled = true
 
@@ -650,9 +653,9 @@ func serveHTTP(fpath string) error {
 	fs := http.FileServer(http.Dir(fpath))
 	http.Handle("/", fs)
 
-	logrus.Info("distribusi live @ http://localhost:3000")
+	logrus.Infof("distribusi live @ http://localhost%s", port)
 
-	if err := http.ListenAndServe(":3000", nil); err != nil {
+	if err := http.ListenAndServe(port, nil); err != nil {
 		return err
 	}