ADD: added dockerfiles and a logger for the backend

frontend/studia/src/api/user.tsx

@@ -11,11 +11,11 @@ export async function loginUser(email:string, password: string) {
   return res.json(); // { token: string }
 }
 
-export async function registerUser(email:string, password: string){
+export async function registerUser(email:string, username:string, password: string){
   const res = await fetch(`${API_URL}/register`, {
     method: 'POST',
     headers: { 'Content-Type': 'application/json' },
-    body: JSON.stringify({ email, password }),
+    body: JSON.stringify({ email,username, password }),
   });
   if (!res.ok) throw new Error('Registrierung fehlgeschlagen');
   return res.json(); // { token: string }

frontend/studia/src/components/LoginModal.tsx

@@ -1,4 +1,4 @@
-import {loginUser} from "../api/user";
+import {loginUser, registerUser} from "../api/user";
 import { useState } from "react";
 
 export default function LoginModal({ isOpen, onClose, onSuccess }: any) {
@@ -36,8 +36,12 @@ export default function LoginModal({ isOpen, onClose, onSuccess }: any) {
           }
 
           // TODO: Call registerUser API
-          // const res = await registerUser(email as string, username as string, password as string);
-          
+          const res = await registerUser(email as string, username as string, password as string);
+          if (!res.ok) {
+            alert("Registration failed!");
+            return;
+          }
+
           // TODO: Implement actual registration logic here
           console.log("Registering with:", email, password);
           // For now, let's just switch back to login after a "successful" registration