Allow configuration from root URL path

app/soapbox/features/public-layout/index.tsx

@@ -2,7 +2,7 @@ import React from 'react';
 import { Switch, Route, Redirect } from 'react-router-dom';
 
 import LandingGradient from 'soapbox/components/landing-gradient';
-import { useAppSelector } from 'soapbox/hooks';
+import { useAppSelector, useSoapboxConfig } from 'soapbox/hooks';
 import { isStandalone } from 'soapbox/utils/state';
 
 import AboutPage from '../about';
@@ -13,6 +13,9 @@ import Header from './components/header';
 
 const PublicLayout = () => {
   const standalone = useAppSelector((state) => isStandalone(state));
+  const soapboxConfig = useSoapboxConfig();
+
+  const shouldRedirectFromRoot = soapboxConfig.redirectRootNoLogin && !soapboxConfig.redirectRootNoLogin.match(/^\/?$/);
 
   if (standalone) {
     return <Redirect to='/login/external' />;
@@ -28,7 +31,11 @@ const PublicLayout = () => {
 
           <div className='relative'>
             <Switch>
-              <Route exact path='/' component={LandingPage} />
+              {shouldRedirectFromRoot ? (
+                <Redirect exact path='/' to={soapboxConfig.redirectRootNoLogin} />
+              ) : (
+                <Route exact path='/' component={LandingPage} />
+              )}
               <Route exact path='/about/:slug?' component={AboutPage} />
             </Switch>
           </div>

app/soapbox/normalizers/soapbox/soapbox-config.ts

@@ -115,6 +115,7 @@ export const SoapboxConfigRecord = ImmutableRecord({
   feedInjection: true,
   tileServer: '',
   tileServerAttribution: '',
+  redirectRootNoLogin: '/',
 }, 'SoapboxConfig');
 
 type SoapboxConfigMap = ImmutableMap<string, any>;