MAPG-69 merge SignupController to LoginController and introduce Google login/sign up

views/login/signup.php

@@ -0,0 +1,26 @@
+<?php
+$jsFiles = [
+    'js/signup.js',
+];
+?>
+<?php require ROOT . '/views/templates/main_header.php'; ?>
+<?php require ROOT . '/views/templates/header.php'; ?>
+<div class="main">
+    <h2>Sign up</h2>
+    <div class="box">
+        <form id="signupForm" action="/signup" method="post">
+            <input class="big fullWidth" type="email" name="email" placeholder="Email address" required autofocus>
+            <input class="big fullWidth marginTop" type="password" name="password" placeholder="Password" required minlength="6">
+            <input class="big fullWidth marginTop" type="password" name="password_confirm" placeholder="Password confirmation" required minlength="6">
+            <p id="signupFormError" class="formError justify marginTop"></p>
+            <div class="right marginTop">
+                <button type="submit">Sign up</button>
+            </div>
+            <hr>
+            <div class="center">
+                <a class="button yellow" href="/login/google" title="Signup with Google">Signup with Google</a>
+            </div>
+        </form>
+    </div>
+</div>
+<?php require ROOT . '/views/templates/main_footer.php'; ?>