Ask HN: How should I deploy my small-scale PHP web applications?

I run several small, PHP based websites, they mostly reside on Digital Ocean until I feel a need to switch to AWS.

What is a simple workflow for managing code and deployments of code? Do you have private GitHub repos and your web servers continuously check and integrate the master branch? Do you prefer to take the site down manually and move code around by hand?

I imagine everyone has their own flow, it'd be interesting to hear some so I can improve on my lacking methods.