read the documentation you listed
dug around the official docs setting up and getting informed beforehand
I read about testing to the staging letsencrypt api, but then forgot to add that
ran the container, it failed to get ssl certificates, but it blocked me in less than 20 seconds
I then changed some configs, since i was testing different ways of how it might work, but even after switching to the staging api for letsencrypt, i still receive logs saying it is refused and on timeout
ERR ts=1688509895.6641216 logger=tls.obtain msg=will retry error=[nextcloud.mysite.com] Obtain: [nextcloud.mysite.com] solving challenge: nextcloud.mysite.com: [nextcloud.mysite.com] authorization failed: HTTP 400 urn:ietf:params:acme:error:dns - DNS problem: NXDOMAIN looking up A for nextcloud.mysite.com - check that a DNS record exists for this domain; DNS problem: NXDOMAIN looking up AAAA for nextcloud.mysite.com - check that a DNS record exists for this domain (ca=https://acme-staging-v02.api.letsencrypt.org/directory) attempt=2 retrying_in=120 elapsed=66.535909489 max_duration=2592000
ERR ts=1688509906.5700405 logger=tls.obtain msg=unable to unlock identifier=sp.mysite.com lock_key=issue_cert_sp.27082019.xyz error=remove /data/caddy/locks/issue_cert_sp.mysite.com.lock: no such file or director