fix(auth): update backend URL and API endpoint for authentication

frontend/app/login/page.tsx

@@ -96,84 +96,3 @@ export default function LoginPage() {
     </main>
   );
 }
-
-
-  const [username, setUsername] = useState('');
-  const [password, setPassword] = useState('');
-  const [error, setError] = useState('');
-  const [loading, setLoading] = useState(false);
-
-  async function handleSubmit(e: FormEvent) {
-    e.preventDefault();
-    setError('');
-    setLoading(true);
-    const result = await signIn('credentials', {
-      username,
-      password,
-      redirect: false,
-    });
-    setLoading(false);
-    if (result?.error) {
-      setError('Felaktigt användarnamn eller lösenord');
-    } else {
-      router.push(callbackUrl);
-      router.refresh();
-    }
-  }
-
-  return (
-    <main style={{ maxWidth: 400, margin: '80px auto', padding: '0 1rem' }}>
-      <h1 style={{ marginBottom: '1.5rem' }}>Logga in</h1>
-      <form onSubmit={handleSubmit} style={{ display: 'flex', flexDirection: 'column', gap: '1rem' }}>
-        <div>
-          <label htmlFor="username" style={{ display: 'block', marginBottom: 4 }}>
-            Användarnamn
-          </label>
-          <input
-            id="username"
-            type="text"
-            value={username}
-            onChange={(e) => setUsername(e.target.value)}
-            required
-            autoComplete="username"
-            style={{ width: '100%', padding: '8px 12px', borderRadius: 6, border: '1px solid #ccc', fontSize: '1rem' }}
-          />
-        </div>
-        <div>
-          <label htmlFor="password" style={{ display: 'block', marginBottom: 4 }}>
-            Lösenord
-          </label>
-          <input
-            id="password"
-            type="password"
-            value={password}
-            onChange={(e) => setPassword(e.target.value)}
-            required
-            autoComplete="current-password"
-            style={{ width: '100%', padding: '8px 12px', borderRadius: 6, border: '1px solid #ccc', fontSize: '1rem' }}
-          />
-        </div>
-        {error && <p style={{ color: 'red', margin: 0 }}>{error}</p>}
-        <button
-          type="submit"
-          disabled={loading}
-          style={{
-            padding: '10px',
-            background: '#2563eb',
-            color: 'white',
-            border: 'none',
-            borderRadius: 6,
-            fontSize: '1rem',
-            cursor: loading ? 'not-allowed' : 'pointer',
-            opacity: loading ? 0.7 : 1,
-          }}
-        >
-          {loading ? 'Loggar in...' : 'Logga in'}
-        </button>
-        <p style={{ textAlign: 'center', fontSize: '0.9rem' }}>
-          Inget konto? <a href="/register">Skapa konto</a>
-        </p>
-      </form>
-    </main>
-  );
-}

frontend/auth.ts

@@ -1,7 +1,7 @@
 import NextAuth from 'next-auth';
 import Credentials from 'next-auth/providers/credentials';
 
-const BACKEND_URL = process.env.NEXT_PUBLIC_API_URL ?? 'http://recipe-api:3000/api';
+const BACKEND_URL = process.env.NEXT_PUBLIC_API_URL_INTERNAL ?? 'http://recipe-api:8080';
 
 export const { handlers, auth, signIn, signOut } = NextAuth({
   providers: [
@@ -13,7 +13,7 @@ export const { handlers, auth, signIn, signOut } = NextAuth({
       async authorize(credentials) {
         if (!credentials?.username || !credentials?.password) return null;
         try {
-          const res = await fetch(`${BACKEND_URL}/auth/login`, {
+          const res = await fetch(`${BACKEND_URL}/api/auth/login`, {
             method: 'POST',
             headers: { 'Content-Type': 'application/json' },
             body: JSON.stringify({