Caddyfile.template incorrect configuration cause infinite redirect

According to caddy's doc https://caddyserver.com/docs/caddyfile/directives/reverse_proxy#defaults

By default, Caddy passes through incoming headers—including Host—to the backend without modifications, with three exceptions:

• It sets or augments the X-Forwarded-For header field.
• It sets the X-Forwarded-Proto header field.
• It sets the X-Forwarded-Host header field.

For these X-Forwarded-* headers, by default, the proxy will ignore their values from incoming requests, to prevent spoofing.

But the Caddyfile.template set these two header incorrectly

https://github.com/opf/openproject-docker-compose/blob/9104e069820bb3470088c391465a1c150cdbbdc4/proxy/Caddyfile.template#L10-L11

Causing the web frontend received the following data, then frontend return 301 redirect to https://openproject.local:8043 infinitely.

Listening on 0.0.0.0 8080
Connection received on 10.89.3.6 58158
GET / HTTP/1.1
Host: openproject.local:8043
User-Agent: curl/8.14.1
Accept: */*
Via: 2.0 Caddy
X-Forwarded-For: 
X-Forwarded-Host: openproject.local:8043
X-Forwarded-Proto: 
Accept-Encoding: gzip

After remove these two header_up lines, reverse_proxy works as except:

Listening on 0.0.0.0 8080
Connection received on 10.89.3.7 59848
GET / HTTP/1.1
Host: openproject.local:8043
User-Agent: curl/8.14.1
Accept: */*
Via: 2.0 Caddy
X-Forwarded-For: 10.89.3.7
X-Forwarded-Host: openproject.local:8043
X-Forwarded-Proto: https
Accept-Encoding: gzip

Inspect proxy/Caddyfile.template at the referenced header_up lines and compare them with Caddy's reverse_proxy header defaults. Reproduce the request headers shown in the issue, then verify the configuration no longer causes the web frontend to return an infinite 301 redirect and that forwarded headers contain the expected values.