add base path setting

views/head.ejs

@@ -8,6 +8,6 @@ table{border-collapse:collapse;width:100%}td,th{border-bottom:1px solid #8884;pa
 form.i{display:inline}input,select{max-width:100%}
 </style>
 <script nonce="<%= nonce %>">document.addEventListener("submit",e=>{const m=e.target.dataset.confirm;if(m&&!confirm(m))e.preventDefault()})</script>
-<nav><a href="/">Leagues</a> ·
-<% if (admin) { %><b>admin</b> <form class="i" method="post" action="/logout"><button>Logout</button></form>
-<% } else { %><a href="/login">Admin login</a><% } %></nav>
+<nav><a href="<%= base %>/">Leagues</a> ·
+<% if (admin) { %><b>admin</b> <form class="i" method="post" action="<%= base %>/logout"><button>Logout</button></form>
+<% } else { %><a href="<%= base %>/login">Admin login</a><% } %></nav>