diff --git a/apps/docs/docs/self-hosting/configuration/viewer.mdx b/apps/docs/docs/self-hosting/configuration/viewer.mdx
index 1a83b322e..82982553a 100644
--- a/apps/docs/docs/self-hosting/configuration/viewer.mdx
+++ b/apps/docs/docs/self-hosting/configuration/viewer.mdx
@@ -17,6 +17,7 @@ Parameters marked with <Asterix/> are required.
 | ENCRYPTION_SECRET <Asterix/>      |         | A 256-bit key used to encrypt sensitive data. It is strongly recommended to [generate](https://www.allkeysgenerator.com/Random/Security-Encryption-Key-Generator.aspx) a new one. The secret should be the same between builder and viewer. |
 | NEXT_PUBLIC_VIEWER_URL <Asterix/> |         | The viewer base URL. Should be the publicly accessible URL (i.e. `https://bot.domain.com`)                                                                                                                                                  |
 | NEXTAUTH_URL <Asterix/>           |         | The builder base URL. Should be the publicly accessible URL (i.e. `https://typebot.domain.com`)                                                                                                                                             |
+| DEBUG                             | false   | If enabled, the server will print valuable logs to debug config issues.                                                                                                                                                                     |
 
 ## Emails (Notifications)
 
diff --git a/apps/viewer/src/pages/[[...publicId]].tsx b/apps/viewer/src/pages/[[...publicId]].tsx
index 91af45016..be1fefd46 100644
--- a/apps/viewer/src/pages/[[...publicId]].tsx
+++ b/apps/viewer/src/pages/[[...publicId]].tsx
@@ -29,6 +29,11 @@ const incompatibleBrowsers = [
   },
 ]
 
+const log = (message: string) => {
+  if (process.env.DEBUG !== 'true') return
+  console.log(`[DEBUG] ${message}`)
+}
+
 export const getServerSideProps: GetServerSideProps = async (
   context: GetServerSidePropsContext
 ) => {
@@ -38,9 +43,12 @@ export const getServerSideProps: GetServerSideProps = async (
     )?.name ?? null
   const pathname = context.resolvedUrl.split('?')[0]
   const { host, forwardedHost } = getHost(context.req)
+  log(`host: ${host}`)
+  log(`forwardedHost: ${forwardedHost}`)
   try {
     if (!host) return { props: {} }
     const viewerUrls = (getViewerUrl({ returnAll: true }) ?? '').split(',')
+    log(`viewerUrls: ${viewerUrls}`)
     const isMatchingViewerUrl =
       env('E2E_TEST') === 'true'
         ? true
@@ -52,6 +60,7 @@ export const getServerSideProps: GetServerSideProps = async (
                   .split(':')[0]
                   .includes(url.split('//')[1].split(':')[0]))
           )
+    log(`isMatchingViewerUrl: ${isMatchingViewerUrl}`)
     const customDomain = `${forwardedHost ?? host}${
       pathname === '/' ? '' : pathname
     }`