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Setting up the Docker Registry with Let's Encrypt TLS support

This gist describes how to set up a private Docker Registry on an AWS EC2 instance and how to secure it with TLS using a certificate by Let's Encrypt.

A Docker registry is a server side application that stores and lets you distribute Docker images. It runs in an own Docker container and the image is freely available. Let's Encrypt is a Certificate Authority that gives away TLS certificates for free.

0. Prerequisites

We require the following three items to be set up correctly before we start.