feat: add CLI flags to app

- implement command-line flags for listen address and port
- add usage section to README

🤖

cmd/server/main.go

@@ -1,6 +1,7 @@
 package server
 
 import (
+	"flag"
 	"fmt"
 	"git.smsvc.net/pomodoro/GoTomato/internal/websocket"
 	"git.smsvc.net/pomodoro/GoTomato/pkg/models"
@@ -8,12 +9,17 @@ import (
 	"net/http"
 )
 
-var serverConfig = models.GoTomatoServerConfig{
-	ListenAddress: "0.0.0.0",
-	ListenPort:    8080,
-}
-
 func Start() {
+	// Define CLI flags for ListenAddress and ListenPort
+	listenAddress := flag.String("listenAddress", "0.0.0.0", "IP address to listen on")
+	listenPort := flag.Int("listenPort", 8080, "Port to listen on")
+	flag.Parse()
+
+	serverConfig := models.GoTomatoServerConfig{
+		ListenAddress: *listenAddress,
+		ListenPort:    *listenPort,
+	}
+
 	listen := fmt.Sprintf("%s:%d", serverConfig.ListenAddress, serverConfig.ListenPort)
 
 	http.HandleFunc("/ws", websocket.HandleConnections)