Only rewrite URLs in Gitea (not HTTPD)

Source: https://docs.gitea.io/en-us/reverse-proxies/

roles/gitea/templates/app.ini.j2

@@ -119,7 +119,7 @@ FILE_EXTENSIONS = .md,.markdown,.mdown,.mkd
 ; The protocol the server listens on. One of 'http', 'https', 'unix' or 'fcgi'.
 PROTOCOL = http
 DOMAIN = localhost
-ROOT_URL = %(PROTOCOL)s://%(DOMAIN)s:%(HTTP_PORT)s/
+ROOT_URL = %(PROTOCOL)s://%(DOMAIN)s:%(HTTP_PORT)s{{ gitea_url }}/
 ; The address to listen on. Either a IPv4/IPv6 address or the path to a unix socket.
 HTTP_ADDR = 0.0.0.0
 HTTP_PORT = {{ gitea_port }}

roles/gitea/templates/gitea.conf.j2

@@ -1,11 +1,17 @@
 # All URLs go to Gitea web server. Static content is bundled in the executable.
+ProxyPreserveHost On
 ProxyRequests off
-ProxyPass {{ gitea_url }}/ http://localhost:{{ gitea_port }}/
+
+<Proxy *>
+  Order allow,deny
+  Allow from all
+</Proxy>
+
+# Note: no trailing slash after either {{ gitea_url }} or port
+ProxyPass {{ gitea_url }} http://localhost:{{ gitea_port }}
+ProxyPassReverse {{ gitea_url}} http://localhost:{{ gitea_port }}
 
 <Location {{ gitea_url }}/>
-  ProxyPassReverse /
-  ProxyHTMLEnable On
-  ProxyHTMLURLMap / {{ gitea_url }}/
   RequestHeader unset Accept-Encoding
 </Location>