feat: add config example

config.example.yaml

@@ -26,6 +26,19 @@ http_server:
 
 # Meta-protocol modules configuration options.
 modules:
+  # Configuration options for BRC20 module. Can be removed if not used.
+  brc20:
+    database: "postgres" # Database to store BRC20 data. current supported databases: "postgres"
+    datasource: "database" # Data source to be used for Bitcoin data. current supported data sources: "bitcoin-node".
+    api_handlers: # API handlers to enable. current supported handlers: "http"
+      - http
+    postgres:
+      host: "localhost"
+      port: 5432
+      user: "postgres"
+      password: "password"
+      db_name: "postgres"
+      # url: "postgres://postgres:password@localhost:5432/postgres?sslmode=prefer" # [Optional] This will override other database credentials above.
   # Configuration options for Runes module. Can be removed if not used.
   runes:
     database: "postgres" # Database to store Runes data. current supported databases: "postgres"