streamlit ui from json config file (app.py)

1. Setup config file as per example app
2. Run source app.sh to deploy streamlit app

streamlit ui from Neo4j metadata (app_graph.py)

1. Set environment variables NEO4J_HOST, NEO4J_USER, NEO4J_PASSWORD for connection to Neo4j database
2. Use https://arrows.app/ to create app metadata (see example app)
3. Update app.sh by replacing app.py with app_graph.py and run source app.sh to deploy streamlit app