Add signin page.

frontend/src/app/pages/signin/signin.component.html

@@ -0,0 +1,39 @@
+<form [formGroup]="signinForm" (submit)="performSignin()" ngNativeValidate>
+    <h1>Signin</h1>
+    <div>
+        <mat-icon>person</mat-icon>
+        <label for="pseudo">
+            Pseudo
+            <span class="required">*</span>
+        </label>
+        <input type="text" id="pseudo" formControlName="pseudo" autocomplete="pseudo" required />
+    </div>
+    <div>
+        <mat-icon>mail</mat-icon>
+        <label for="email">
+            Email address
+            <span class="required">*</span>
+        </label>
+        <input type="email" id="email" formControlName="email" autocomplete="email" required />
+    </div>
+    <div>
+        <mat-icon>lock</mat-icon>
+        <label for="password">
+            Password
+            <span class="required">*</span>
+        </label>
+        <input type="password" id="password" formControlName="password" required />
+    </div>
+    <div>
+        <mat-icon>lock</mat-icon>
+        <label for="confirm-password">
+            Confirm password
+            <span class="required">*</span>
+        </label>
+        <input type="password" id="confirm-password" formControlName="confirmPassword" required />
+    </div>
+    <div class="actions">
+        <button type="submit">Send</button>
+        <a [routerLink]="['/login']">I already have an account</a>
+    </div>
+</form>