update readme

README.org

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+* clone the repository
+* cd into the repository
+**
+* create a virtual environment for python
+** python -m venv venv
+* activate the environment
+** source venv/bin/activate
+* update pip
+** pip install upgrade pip
+* install requirements
+** pip install -r requirements.txt
+* cd into the renderer
+** cd render
+* start the renderer
+**  python app.py
+* go to http://localhost:5000 to view the graph