deploy: switch docker-compose back to :latest

Pinning to :1.4.2 was a one-shot safety measure today after the
:1.4.1 GHCR tag never published and we needed Coolify to deploy a
known image. Now that :1.4.2 is verifiably live and the healthcheck
fix is in the image, switch back to :latest so future GHCR builds
auto-roll to production without a docker-compose edit.

Self-hosters who prefer pinning can override via
docker-compose.override.yml — the upstream compose default stays
on :latest as before.

docker-compose.yml

@@ -9,7 +9,7 @@ services:
     # to the last release that's verifiably running on self-host installs to
     # rule out runtime / Docker-network issues. No `build:` block on purpose:
     # we want Coolify to PULL the prebuilt image, not build from source.
-    image: ghcr.io/mbombeck/healthlog:1.4.2
+    image: ghcr.io/mbombeck/healthlog:latest
     container_name: healthlog-app
     ports:
       - "3000:3000"