Misc login page fixes

src/app/pages/login/login.page.scss

@@ -2,4 +2,8 @@
   height: 100%;
   display: flex;
   flex-direction: column;
-}
+}
+
+button {
+  background: rgba(0,0,0,0);
+}

src/app/pages/login/login.page.ts

@@ -50,7 +50,7 @@ export class LoginPage implements OnInit {
         public readonly navService: NavigationService,
         public readonly auth: AuthService,
     ) {
-        this.coreidUrl = this.api._build_url('/auth/starship_coreid/login', '/');
+        this.coreidUrl = this.api._build_url(environment.starshipUrl, '/');
     }
 
     ngOnInit() {}