Add registry, ingest, timeline, tickets features

README.md

@@ -162,3 +162,16 @@ internal/api
 5. Expose asset/component timeline APIs
 
 Start with data model correctness, not UI.
+
+## Local Configuration
+
+The API loads settings from environment variables and an optional `config.json`.
+If `CONFIG_FILE` is set, it will load that file. Otherwise it looks for `config.json`
+in the working directory if present. Environment variables override file values.
+
+Database configuration can be provided as a full `database_dsn` or as discrete
+fields under `database` (user/password/host/port/name/params). If `database_dsn`
+is empty and no `DATABASE_DSN` env var is set, the discrete fields are used
+to build the DSN.
+
+An example file is available as `config.example.json`.