add notes regarding pipenv

readme.md

@@ -4,14 +4,40 @@ run tests:
 python3 -m unittest -v test
 ```
 
+Install dependencies
+
+```
+pipenv install
+```
+
 run app:
 
 ```
-python3 dmxfun.py
+FLASK_APP="pixelframe" pipenv run flask run
 ```
 
 ## pipenv
 
+### Setup pipenv on linux (mint 20)
+
+[Source](https://pipenv.pypa.io/en/latest/install/#installing-pipenv)
+
+Install pipx
+
+> `Pipx`_ is a tool to help you install and run end-user applications written in Python. It installs applications into an isolated and clean environment on their own.
+
+```
+pip3 install --user pipx
+```
+
+Install pipenv:
+
+```
+pipx install pipenv
+```
+
+### Using pipenv
+
 install a dependency with pipenv:
 
 ```