redirection and merge resolve (fix #113)

This commit will add
- redirections to behaviour page

- resolving a merge conflict

frontend/src/components/pages/Behavior.js

@@ -0,0 +1,14 @@
+import React from "react";
+import "../../App.css";
+import Footer from "../../Footer";
+
+export default function Behavior() {
+  return (
+    <>
+      <div className="sitePage">
+        <h1>Studie Verhaltensmerkmale</h1>
+      </div>
+      <Footer />
+    </>
+  );
+}

frontend/src/components/pages/Login.js

@@ -4,6 +4,7 @@ import "../../App.css";
 import Footer from "../../Footer";
 import InputField from "../InputField";
 import SubmitField from "../SubmitField";
+import { Redirect } from "react-router";
 import { login, useAuth, logout } from "../../auth/AuthProvider";
 import Secret from "./Secret";
 import ErrorMessage from "../ErrorMessage";
@@ -71,8 +72,7 @@ export default function Login() {
           </form>
         ) : (
           <>
-            <Secret />
-            <button onClick={() => logout()}>Logout</button>
+            <Redirect to="/behavior" />
           </>
         )}
       </div>

frontend/src/components/pages/Umfrage.js

@@ -8,6 +8,7 @@ import SubmitField from "../SubmitField";
 import { authFetch } from "../../auth/AuthProvider";
 import ErrorMessage from "../ErrorMessage";
 import { Link } from "react-router-dom";
+import { Redirect } from "react-router";
 
 export default function Umfrage() {
   /* values from survey */
@@ -218,7 +219,7 @@ export default function Umfrage() {
         {!isSurveyValidBackend ? (
           <ErrorMessage message={backendErrorMessage} />
         ) : (
-          <p>{backendSuccessMessage}</p>
+          <Redirect to="/behavior" />
         )}
       </div>
       <Footer />