refactor: replace custom CRM with Monica fork

docs/administrators/deployment.md

@@ -0,0 +1,24 @@
+This document is aimed at the people deploying Monica on https://monicahq.com, and does not apply to the people installing Monica for their own use.
+
+## Before deploying a new version
+
+* Make sure `config/monica.php` contains the number of the new release you are about to create.
+* Update `CHANGELOG.md` accordingly.
+* Create a new release on https://version.monicahq.com with the release notes.
+* Create a new release on https://github.com/monicahq/monica/releases, which will also automatically create a new tag.
+* Write the release note with the tool hosted on https://monicahq.com/login
+* Push the code to production.
+
+## Deployment of the Docker images
+
+This guide has been posted by [kstrauser](https://github.com/monicahq/monica/issues/676#issuecomment-352047750) - thanks for his help. Here are the steps necessary to deploy Monica on Docker hub:
+* You need an account on [Docker hub](https://hub.docker.com).
+* You need to have Docker installed on your machine.
+* Run the following commands (example for the version 3.4.5):
+
+```
+git reset --hard v3.4.5
+make docker_build docker_tag docker_push
+```
+
+The image should be up on the Docker Hub.