Get Docker container production-ready

[geerlingguy]

The Dockerfile included in this repository currently sets up a container image only really suitable for local development purposes. I'd like to make sure the Docker image generated by default is production ready and deployable.

Selfishly, it's the first step in getting JeffGeerling.com completely Kubernetes runnable, and ideally in a hosted repository on Docker Hub.

[geerlingguy]

First step done, and I have an image pushed manually: https://hub.docker.com/r/geerlingguy/jeffgeerling-com

[geerlingguy]

Next steps:

• [x] Test the image on a Pi, make sure it works
• [x] Configure this GitHub project to automatically release new versions on new commits to master.

arm64 only for now.

[geerlingguy]

Installation seems to be working somewhat... things are a little shaky but hey, if it works it works:

I get the following errors currently:

The Drupal installer requires that the ./sites/default/default.settings.php file must not be deleted or modified from the original download.

The Drupal installer requires write permissions to ./sites/default/settings.php during the installation process. The [webhosting issues](https://www.drupal.org/server-permissions) documentation section offers help on this and other topics.

Failed to connect to your database server. The server reports the following message: SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution.

But that's related to my K8s template layout in the turing-pi-2-cluster project. So... maybe installation with a config file mounted via Kubernetes isn't the best way for my own image :/

I was trying to hack the K8s template so it could easily work with both the library Docker image (https://hub.docker.com/_/drupal/) and my website image, but I might have to fully commit to my image instead.

[geerlingguy]

Works. Done. Yay.