PoC: Blue-green deployment wih Docker Compose, Nginx, Consul and Registrator

Run docker network create consul to create a new network;
Run docker-compose -f docker-compose-consul.yml up -d to start Consul and Registrator;
Open in browser http://localhost:8500/ to check;
Run ./deploy.sh to first run;
Open in browser http://localhost/ to check;
Run ./deploy.sh to imitate deploying of a new app;
Open in browser http://localhost/ to check a new version;
Run ./rollback.sh to imitate a rollback;
Open in browser http://localhost/ to check an old version;
Use python2.7 test.py in a new terminal to be sure that an app is always online during a deploy/rollback.

You can read more about this technique here: https://medium.com/rate-engineering/using-docker-containers-to-run-a-distributed-application-locally-eeabd360bca3

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