Document the bundler-args argument

README.md

@@ -952,6 +952,19 @@ $ node -e "import('./index.js').then(m => console.log(m.main))"
 [Function]
 ```
 
+If the build fails with `✘ [ERROR] Could not resolve "better-sqlite3"`, you can pass extra arguments to esbuild with:
+
+- the `bundler-args` argument, for example: `--bundler-args "--external:better-sqlite3"`.
+
+… or by using the following configuration:
+
+```yaml
+package:
+  bundle:
+    extra_args:
+      - "--external:better-sqlite3"
+```
+
 ### Enable source maps
 
 When bundling, you can include `--source-maps` to generate a final source map for your bundle.