pip3 install virtualenv
virtualenv -p python3 docker_flask
source docker_flask/bin/activate
pip3 install flask
pip3 freeze > requirements.txt
python3 app.py
brew install npm
npm install -g nodemon
nodemon app.py
docker build -t flask-docker-python .
docker run -d --name python-container -p 3200:3200 flask-docker-python
docker ps -a