A sample web application to run on a VM

Install nginx, python flask and other support applications to run flask apps
Install ssl-certificates (sample ones but good for testing)
Run nginx on port 80 and port 443
Run flask app on localhost:8000
Setup proxy on nginx to go to flask app
Flask app just returns all the headers back as the response
Flask app supports GET PUT POST and DELETE on all the paths
Create a system service to run this app

Run the script as root user on ubuntu host

bash setup_ubuntu_vm.sh
curl localhost
curl -k https://localhost

To run flask app as root user without going through nginx proxy

bash gunicorn_ubuntu.sh

Run the script as root user on centos 7 host

sudo bash setup_centos7_vm.sh
curl localhost
curl -k https://localhost

To run flask app as root user without going through nginx proxy

bash gunicorn_centos7.sh

To run flask app via nginx

ps -ef | grep gunicorn
kill the parent gunicorn process
systemctl start nginx
systemctl start restapp

Running in a container

cd container
docker build -t app .
docker run -d --rm -p 8000:80 -p 8443:443 app