Non-functional
- Refactor Docker part in README.md
- Move files used for Docker into dedicated directory
- Wait until database container has booted before starting app container
- Map port of MySQL container to 33061
- Copy files into Docker image instead of downloading release from GitHub
- Change column type to unsigned big integer for ID in users table
- #429 - Upgrade to MySQL 8
- Reinstate hosted link in README.md
- Get rid of misunderstood badge in README.md