fix: redirects shall be relative

Fixes an issue where the proxied-to hostname and port would leak into the generated URL through the reverse-proxy chain.

env/nginx/nginx.conf

@@ -6,7 +6,9 @@ events {}
 http {
     include     mime.types;
     charset     utf-8;
-    access_log  off;
+
+    access_log         off;
+    absolute_redirect  off;
 
     server {
         listen       8080;