fix(services): Fix duplicate health registry provider

- Change from fx.Provide to fx.Invoke for health registry registration
  - CoreModule() already provides *health.Registry
  - Services should register their database checkers with the existing registry
  - Use fx.Invoke to register database health checkers instead of providing new registry

- Fixes duplicate provider error for *health.Registry
- All services now build and should start successfully

.gitignore

@@ -60,8 +60,6 @@ temp/
 docs/site/
 docs/.mkdocs_cache/
 
-# Docker
-.dockerignore
 
 # OS-specific
 Thumbs.db