Add port flag to serve

Signed-off-by: Odyssium <hi@odyssey346.dev>

cmd/gothub/serve.go

@@ -6,15 +6,22 @@ import (
 	"codeberg.org/gothub/gothub/serve"
 )
 
+var port string = "3000"
+
 var serveCmd = &cobra.Command{
 	Use:   "serve",
 	Short: "Start the web server.",
 	Long:  `Start the web server.`,
 	Run: func(cmd *cobra.Command, args []string) {
-		serve.Serve()
+		serve.Serve(port)
 	},
 }
 
 func init() {
 	rootCmd.AddCommand(serveCmd)
+
+	serveCmd.Flags().StringVarP(&port, "port", "p", "", "The port GotHub will listen to. Defaults to 3000, and overrides the GOTHUB_PORT environment variable.")
+
+	// set port variable to the value of the port flag
+	port = serveCmd.Flag("port").Value.String()
 }

serve/serve.go

@@ -21,7 +21,7 @@ import (
 	_ "github.com/joho/godotenv/autoload"
 )
 
-func Serve() {
+func Serve(port string) {
 	engine := html.New("./views", ".html")
 
 	engine.AddFunc(
@@ -135,5 +135,8 @@ func Serve() {
 	if !ok {
 		val = "3000"
 	}
+	if port != "" {
+		val = port
+	}
 	log.Fatal(app.Listen(":" + val))
 }