Add Docker documentation

admin/docker.md

@@ -0,0 +1,32 @@
+# Docker
+
+## Using Docker for Development
+
+If you'd like to use Docker as a base for working on a site's styles and such,
+you can run the following from a Bash shell.
+
+*Note: This process is intended only for working on site styling. If you'd
+like to run Write Freely in production as a Docker service, it'll require a
+little more work.*
+
+The `docker-setup.sh` script will present you with a few questions to set up
+your dev instance. You can hit enter for most of them, except for "Admin username"
+and "Admin password." You'll probably have to wait a few seconds after running
+`docker-compose up -d` for the Docker services to come up before running the
+bash script.
+
+```
+docker-compose up -d
+./docker-setup.sh
+```
+
+Now you should be able to navigate to http://localhost:8080 and start working!
+
+When you're completely done working, you can run `docker-compose down` to destroy
+your virtual environment, including your database data. Otherwise, `docker-compose stop`
+will shut down your environment without destroying your data.
+
+## Using Docker for Production
+
+WriteFreely doesn't yet provide an official Docker pathway to production. We're
+working on it, though!