Invalid response while proxying

1. The problem I’m having:

I am trying to reverse proxy using caddy.
Opening the website in a browser results in the below error.

And running curl -vL resaults

*   Trying ::1:8888...
* Connected to localhost (::1) port 8888 (#0)
> GET / HTTP/1.1
> Host: localhost:8888
> User-Agent: curl/7.74.0
> Accept: */*
* Mark bundle as not supporting multiuse
< HTTP/1.1 502 Bad Gateway
< Server: Caddy
< Date: Sun, 06 Aug 2023 11:48:08 GMT
< Content-Length: 0
* Connection #0 to host localhost left intact

2. Error messages and/or full log output:

In the console where “sudo caddy run” is run i get

2023/08/06 11:48:08.962 ERROR   http.log.error  dial tcp [::1]:80: connect: connection refused  {"request": {"remote_ip": "::1",
 "remote_port": "56542", "client_ip": "::1", "proto": "HTTP/1.1", "method": "GET", "host": "localhost:8888", "uri": "/", 
"headers": {"User-Agent": ["curl/7.74.0"], "Accept": ["*/*"]}}, "duration": 0.000601017, "status": 502, "err_id": "5a5gc4k9t", "err_trace": "reverseproxy.statusError (reverseproxy.go:1246)"}

That was all a single line but i tried to get it more readable by making it multiple.
“journalctl -u caddy --no-pager | less +G” results in

-- Journal begins at Thu 2023-07-27 20:30:00 EEST, ends at Sun 2023-08-06 14:51:12 EEST. --
-- No entries --

I did not run debug because I did not understand where I was supposed to put it

3. Caddy version:

v2.7.3 h1:eMCNjOyMgB5A1KgOzT2dXKR4I0Va+YHCJYC8HHu+DP0=

4. How I installed and ran Caddy:

Using Install — Caddy Documentation debian/ubuntu/raspbian stable

Debian 11, x86_64

b. Command:

sudo caddy run

c. Service/unit/compose file:

what does this mean?

d. My complete Caddy config:

http://localhost:8888 {
route /docpht* {
    uri strip_prefix /docpht
    reverse_proxy localhost:8008

route /fenrus* {
    uri strip_prefix /fenrus
    reverse_proxy localhost:3000

route /portainer* {
    uri strip_prefix /portainer
    reverse_proxy localhost:9000

route /WeTTY* {
    uri strip_prefix /WeTTY
    reverse_proxy localhost:3030

route / {
    uri strip_prefix /
    reverse_proxy localhost:80

5. Links to relevant resources:

Your config is invalid. Directives must go within site blocks. See Caddyfile Concepts — Caddy Documentation

I’ve now gotten it proxying basic apps that dont pull in anything extra. But I don’t really understand rewrite so apps like fenrus try to load from / instead of /fenrus/ .

Any tips?

Please read this article:

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