fix: Preact router and BASE_URL

client/App.tsx

@@ -1,6 +1,8 @@
 import Router from 'preact-router'
 import { route } from 'preact-router'
-import { useEffect } from 'preact/hooks'
+import { useContext, useEffect } from 'preact/hooks'
+import { prependBaseUrl } from './api'
+import { ServerContext } from './hooks'
 import { AdminPage } from './pages/Admin'
 
 import { HomePage } from './pages/Home'
@@ -21,27 +23,30 @@ const Redirect = ({ to }: { to: string }) => {
 }
 
 export const App = ({ url }: { url?: string }) => {
+    // during server side rendering don't prepend the BASE_URL
+    const pbu = useContext(ServerContext) ? (s: string) => s : prependBaseUrl
+
     return (
         <Router url={url}>
             <HomePage
                 // @ts-ignore
-                path="/"
+                path={pbu('/')}
             />
             <LoginPage
                 // @ts-ignore
-                path="/login"
+                path={pbu('/login')}
             />
             <ProfilePage
                 // @ts-ignore
-                path="/profile"
+                path={pbu('/profile')}
             />
             <ProblemPage
                 // @ts-ignore
-                path="/problem/:id"
+                path={pbu('/problem/:id')}
             />
             <AdminPage
                 // @ts-ignore
-                path="/admin"
+                path={pbu('/admin')}
             />
             <Redirect
                 // @ts-ignore

client/entry-server.tsx

@@ -10,9 +10,9 @@ export default (url: string): RenderedPage => {
 
     const html = renderToString(
         <MetadataContext.Provider value={metadata}>
-            {/* <ServerContext.Provider value={true}> */}
+            <ServerContext.Provider value={true}>
                 <App url={url} />
-            {/* </ServerContext.Provider> */}
+            </ServerContext.Provider>
         </MetadataContext.Provider>
     )