feat: handle the X-Forwarded-Path header (#1197)

* feat: handle the X-Forwarded-Path header

* fix: lint

Signed-off-by: acalcutt <acalcutt@techidiots.net>

---------

Signed-off-by: acalcutt <acalcutt@techidiots.net>
Co-authored-by: Zsolt Jakubinyi <zsolt.jakubinyi@beamtrail.com>
Co-authored-by: acalcutt <acalcutt@techidiots.net>

src/utils.js

@@ -114,9 +114,10 @@ export const getTileUrls = (
 
   const uris = [];
   if (!publicUrl) {
+    let xForwardedPath = `${req.get('X-Forwarded-Path') ? '/' + req.get('X-Forwarded-Path') : ''}`;
     for (const domain of domains) {
       uris.push(
-        `${req.protocol}://${domain}/${path}/${tileParams}.${format}${query}`,
+        `${req.protocol}://${domain}${xForwardedPath}/${path}/${tileParams}.${format}${query}`,
       );
     }
   } else {