updates

README.md

@@ -28,27 +28,37 @@ Run `templ generate -path ./components` to generate code based on template files
 ## Documentation
 Run `swag init --exclude "pkg.mod,pkg.build,pkg.tools" -o server/router/docs`
 
+#### Settings File
+Configuration now lives in the YAML settings file. By default the service reads
+`/etc/dtms/vctp.yml`, or you can override it with the `-settings` flag.
+
+```shell
+vctp -settings /path/to/vctp.yml
+```
+
 #### Database Configuration
 By default the app uses SQLite and creates/opens `db.sqlite3`. You can opt into PostgreSQL
-by setting environment variables:
+by updating the settings file:
 
-- `DB_DRIVER`: `sqlite` (default) or `postgres`
-- `DB_URL`: SQLite file path/DSN or PostgreSQL DSN
+- `settings.database_driver`: `sqlite` (default) or `postgres`
+- `settings.database_url`: SQLite file path/DSN or PostgreSQL DSN
 
 Examples:
-```shell
-# SQLite (default)
-DB_DRIVER=sqlite DB_URL=./db.sqlite3
+```yaml
+settings:
+  database_driver: sqlite
+  database_url: ./db.sqlite3
 
-# PostgreSQL
-DB_DRIVER=postgres DB_URL=postgres://user:pass@localhost:5432/vctp?sslmode=disable
+settings:
+  database_driver: postgres
+  database_url: postgres://user:pass@localhost:5432/vctp?sslmode=disable
 ```
 
 PostgreSQL migrations live in `db/migrations_postgres`, while SQLite migrations remain in
 `db/migrations`.
 
 #### Snapshot Retention
-Hourly and daily snapshot table retention can be configured with environment variables:
+Hourly and daily snapshot table retention can be configured in the settings file:
 
-- `HOURLY_SNAPSHOT_MAX_AGE_DAYS` (default: 60)
-- `DAILY_SNAPSHOT_MAX_AGE_MONTHS` (default: 12)
+- `settings.hourly_snapshot_max_age_days` (default: 60)
+- `settings.daily_snapshot_max_age_months` (default: 12)