fix: set healthcheck for Mailpit container (#4010)

The mailpit container's built-in healthcheck does not work with podman,
which causes `supabase start` to fail without the
`--ignore-health-check` flag.

I'm not 100% sure why this is, but I suspect it's because the mailpit
[healthcheck has `--start-interval=1s`][1], and the `--start-interval`
option was [only added to Docker Engine since v25.0][2]
(or v1.44 of the Docker API), which podman does not yet suppprt
(see containers/podman#26505).

Setting an explicit healthcheck matches the healthchecks we set for the
other containers, and fixes this issue.

[1]: https://github.com/axllent/mailpit/blob/d26e317d2507015d4d9fa247207ccd6a68fe645f/Dockerfile#L28
[2]: https://docs.docker.com/reference/dockerfile/#healthcheck
Fixes half of: #3566

Co-authored-by: Han Qiao <[email protected]>

Author: aloisklink

internal/start/start.go

@@ -730,6 +730,14 @@ EOF
 			ctx,
 			container.Config{
 				Image: utils.Config.Inbucket.Image,
+				Healthcheck: &container.HealthConfig{
+					Test:     []string{"CMD", "/mailpit", "readyz"},
+					Interval: 10 * time.Second,
+					Timeout:  2 * time.Second,
+					Retries:  3,
+					// StartPeriod taken from upstream Dockerfile
+					StartPeriod: 10 * time.Second,
+				},
 			},
 			container.HostConfig{
 				PortBindings:  inbucketPortBindings,