Stop incorrectly issuing new orders on container (re)start

[jcgl17]

closes #19

Previously, I would hit Let's Encrypt rate limiting issues, even when the cert had already been issued:

$ docker logs send-docker-compose_proxy-letsencrypt_1
Info: running acme-companion version v2.6.0-2-g8da1790
Warning: '/etc/acme.sh' does not appear to be a mounted volume.
Info: 4096 bits RFC7919 Diffie-Hellman group found, generation skipped.
Reloading nginx docker-gen (using separate container nginx-proxy)...
Reloading nginx (using separate container nginx-proxy)...
2025/05/21 18:09:56 Generated '/app/letsencrypt_service_data' from 4 containers
2025/05/21 18:09:56 Running '/app/signal_le_service'
2025/05/21 18:09:56 Watching docker events
2025/05/21 18:09:56 Contents of /app/letsencrypt_service_data did not change. Skipping notification '/app/signal_le_service'
[Wed May 21 18:09:58 UTC 2025] Account key creation OK.
[Wed May 21 18:09:58 UTC 2025] Registering account: https://acme-v02.api.letsencrypt.org/directory
[Wed May 21 18:09:59 UTC 2025] Registered
[Wed May 21 18:09:59 UTC 2025] ACCOUNT_THUMBPRINT='qwertyuiop'
Creating/renewal myhost.example.com certificates... (myhost.example.com)
[Wed May 21 18:10:00 UTC 2025] Using CA: https://acme-v02.api.letsencrypt.org/directory
[Wed May 21 18:10:01 UTC 2025] Creating domain key
[Wed May 21 18:10:02 UTC 2025] The domain key is here: /etc/acme.sh/webmaster@example.com/myhost.example.com/myhost.example.com.key
[Wed May 21 18:10:02 UTC 2025] Generating next pre-generate key.
[Wed May 21 18:10:02 UTC 2025] Single domain='myhost.example.com'
[Wed May 21 18:10:04 UTC 2025] Error creating new order. Le_OrderFinalize not found. {
  "type": "urn:ietf:params:acme:error:rateLimited",
  "detail": "too many certificates (5) already issued for this exact set of domains in the last 168h0m0s, retry after 2025-05-21 23:40:23 UTC: see https://letsencrypt.org/docs/rate-limits/#new-certificates-per-exact-set-of-hostnames",
  "status": 429
}
[Wed May 21 18:10:04 UTC 2025] Please check log file for more details: /dev/null
Sleep for 3600s

Now:

$ docker logs send-docker-compose_proxy-letsencrypt_1
Info: running acme-companion version v2.6.0-2-g8da1790
Info: 4096 bits RFC7919 Diffie-Hellman group found, generation skipped.
Reloading nginx docker-gen (using separate container nginx-proxy)...
Reloading nginx (using separate container nginx-proxy)...
2025/05/26 07:19:26 Generated '/app/letsencrypt_service_data' from 4 containers
2025/05/26 07:19:26 Running '/app/signal_le_service'
2025/05/26 07:19:26 Watching docker events
2025/05/26 07:19:26 Contents of /app/letsencrypt_service_data did not change. Skipping notification '/app/signal_le_service'
Creating/renewal myhost.example.com certificates... (myhost.example.com)
[Mon May 26 07:19:26 UTC 2025] Domains not changed.
[Mon May 26 07:19:26 UTC 2025] Skipping. Next renewal time is: 2025-07-19T23:34:40Z
[Mon May 26 07:19:26 UTC 2025] Add '--force' to force renewal.
Sleep for 3600s