chore(ghost): add README

roles/ghost/README.md

@@ -0,0 +1,18 @@
+# `finallycoffee.services.ghost` ansible role
+
+[Ghost](https://ghost.org/) is a self-hosted blog with rich media capabilities,
+which this role deploys in a docker container.
+
+## Requirements
+
+Ghost requires a MySQL-database (like mariadb) for storing it's data, which
+can be configured using the `ghost_database_(host|username|password|database)` variables.
+
+Setting `ghost_domain` to a fully-qualified domain on which ghost should be reachable
+is also required.
+
+Ghosts configuration can be changed using the `ghost_config` variable.
+
+Container arguments which are equivalent to `community.docker.docker_container` can be
+provided in the `ghost_container_[...]` syntax (e.g. `ghost_container_ports` to expose
+ghosts port to the host).