Fix OAuth link generation

src/main.rs

@@ -226,7 +226,6 @@ fn main() {
     println!("applying migrations …");
     db_apply_migrations::test(&mut conn);
 
-
     println!("scanning for contests …");
     refresh_all_contests(&mut conn);
 

templates/index.hbs

@@ -56,7 +56,7 @@
                 <div class="columns blogin">
                   <div class="column is-two-fifths"></div>
                   <div class="column">
-                    <a class="button is-small is-info" href="{{ this.2 }}{{ self_url }}/oauth/{{ this.0 }}">{{ this.1 }}</a>
+                    <a class="button is-small is-info" href="{{ this.2 }}{{ ../self_url }}/oauth/{{ this.0 }}">{{ this.1 }}</a>
                   </div>
                 </div>
               {{/each}}