A minimal Plug.Conn clone to handle 404s

This episode is part 4 in the Zero to Framework (building Alchemist Camp) series:

• Part 1 Making a site with just the Cowboy web server
• Part 2: Deploying with Nanobox (which no longer exists 😢)
• Part 3: Building a router and handling static assets
• Part 4: this page
• Part 5: Adding EEx templates to a Cowboy web server
• Part 6: Putting an OTP app in our OTP app (pro)
• Part 7: Creating controllers for an Elixir web server
• Part 8: Creating a DSL for our router In order to properly set response headers, we begin writing a minimal clone of Plug.Conn. Soon it will be possible to write templates, views and controllers for our site

Source code of the repo is available for members on the page for Part 7!