diff --git a/SUMMARY.md b/SUMMARY.md
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 * [Introduction](README.md)
 * [Developing Provision](docs/developing-provision.md)
+* [Customizing Provision](customizing-provision.md)
 
diff --git a/customizing-provision.md b/customizing-provision.md
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+# Customizing Provision
+
+## Docker Services
+
+When using Provision's Docker services, a docker-compose.yml file is automatically generated, using pre-built images for Database & Web servers.
+
+You can override the docker stack in the following ways
+
+### 1. Create docker-compose-overrides.yml
+
+Each server has a "config path" where all server configuration is stored, such as apache config. Check `provision status` for the server config path. The server config path looks like this:
+
+```
+~/.config/provision/$SERVER_NAME
+   /docker-compose.yml  # Generated on provision verify
+   /docker-compose-overrides.yml   # (Optional) Merged into docker-compose.yml on provision verify** 
+   /mysql.cnf           # (Optional) MySQL configuration can be put into this file.
+   /apacheDocker.conf   # Generated on provision verify
+     /platform.d        # Generated Platform apache configs. 
+     /pre.d             # Custom Apache configs can be put in here.
+     /post.d            # Custom Apache configs can be put in here.
+     /vhost.d           # Generated Site virtualhost configs.
+     /platform.d
+```
+
+\*\* The docker-compose command supports automatic merging of docker-compose.yml files, by passing multiple `-f` options. Provision detects if this file is present and automatically adds this for you.
+