CHANGE: adde OpenAPI Docs + swagger UI

Backend/main.go

@@ -25,7 +25,7 @@ func main() {
 	http.HandleFunc("/time", timeHandler)
 
 	fmt.Printf("Server is running at http://localhost:8080 exposed to port %s\n", getEnv("EXPOSED_PORT", "8000"))
-	log.Fatal(http.ListenAndServe(":8080", nil))
+	log.Fatal(http.ListenAndServe(":8000", nil))
 }
 
 func timeCreateHandler(w http.ResponseWriter, r *http.Request) {
@@ -38,6 +38,9 @@ func timeCreateHandler(w http.ResponseWriter, r *http.Request) {
 }
 
 func timeHandler(w http.ResponseWriter, r *http.Request) {
+	if os.Getenv("DEBUG") == "true" {
+		w.Header().Set("Access-Control-Allow-Origin", "*")
+	}
 	switch r.Method {
 	case "GET":
 		getBookings(w, r)
@@ -46,6 +49,7 @@ func timeHandler(w http.ResponseWriter, r *http.Request) {
 	default:
 		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
 	}
+
 }
 
 func createBooking(w http.ResponseWriter, r *http.Request) {
@@ -69,6 +73,10 @@ func createBooking(w http.ResponseWriter, r *http.Request) {
 
 func getBookings(w http.ResponseWriter, r *http.Request) {
 	card_id := r.URL.Query().Get("cardID")
+	if card_id == "" {
+		http.Error(w, "Missing cardID query parameter", http.StatusBadRequest)
+		return
+	}
 	bookings, err := (*models.Booking).GetBookingsByCardID(nil, card_id)
 	if err != nil {
 		log.Println("Error getting bookings: ", err)