Add healthcheck on web to restart based on curl

[oscgonfer]

This is another attempt to help with web not restarting when app falls over. It adds a healthcheck on runtime to the web container. It seems that the depends_on done in #360 only works for docker compose operations, not in runtime.

This is indicated in the documentation: https://docs.docker.com/reference/compose-file/services/#depends_on

restart: When set to true Compose restarts this service after it updates the dependency service. This applies to an explicit restart controlled by a Compose operation, and excludes automated restart by the container runtime after the container dies. Introduced in Docker Compose version 2.17.0.

[timcowlishaw]

Aha nice! this looks good - only thing to check is that curl is installed in that container!

[oscgonfer]

All good!

$ doco exec web bash
root@8e1d51748359:/# curl http://app:3000 -v
*   Trying 172.22.0.11:3000...
* Connected to app (172.22.0.11) port 3000 (#0)
> GET / HTTP/1.1
> Host: app:3000
> User-Agent: curl/7.88.1
> Accept: */*
> 
< HTTP/1.1 301 Moved Permanently
< Content-Type: text/html
< Location: https://app:3000/
< Content-Length: 0
< 
* Connection #0 to host app left intact