BPMN Modeler with customised Properties Panel, that is used in Flows for APEX.
Run npm install to install the required dependencies.
To start the app, type npm start to start development server. After switching branches, it may be useful to run npm run update-dependencies to synchronize node modules with your package.json. If you start the app for the first time, you can use npm run browser to open the default browser after building the project.