How to use DNS over HTTPS using Docker + Pi-hole + Cloudflare + Docker Compose

Learn how to increase the privacy of your internet activity by implementing DNS encryption. This simple containerized solution will allow you to block ads and malware, while using a secure encrypted channel DNS-over-HTTPs to Cloudflare DNS resolvers.

Important terminology:
Docker Compose: Infrastructure as Code IaC utility for deploying Docker services.
Cloudflared: DNS proxy to encrypt DNS request over HTTPS protocol. Cloudflared is available for Windows, Linux and Mac, and lives inside a Docker container.
DNS encryption enhances your privacy online and protects you from DNS sniffing.
ISP Internet service provider. A company that provides internet services to you.

Important Links:
Original Script for Docker only on Windows / Linux for DNS-level protection
New Script for Docker & Cloudflare for DNS Over HTTPS (DOH)