sp-dev-fx-webparts/samples/react-script-editor-onprem/config/config.json

{
    "$schema": "https://developer.microsoft.com/json-schemas/spfx-build/config.2.0.schema.json",
    "version": "2.0",
    "bundles": {
        "script-editor-bundle": {
            "components": [
                {
                    "entrypoint": "./lib/webparts/scriptEditor/ScriptEditorWebPart.js",
                    "manifest": "./src/webparts/scriptEditor/ScriptEditorWebPart.manifest.json"
                }
            ]
        }
    }
}