Merge pull request #10 from overleaf/sk-document-persisting-ce-texlive

Add documentation on committing CE image

doc/README.md

@@ -39,3 +39,4 @@ documentation on the [Overleaf Wiki](https://github.com/overleaf/overleaf/wiki)
 ## Upgrades
 
 - [Upgrading the Toolkit](./upgrading.md)
+- [Community Edition: Upgrading TexLive](./ce-upgrading-texlive.md)

doc/ce-upgrading-texlive.md

@@ -0,0 +1,32 @@
+# Community Edition: Upgrading TexLive
+
+To save bandwidth, the Overleaf image only comes with a minimal install of [TeXLive](https://www.tug.org/texlive/). To upgrade to a complete TeXLive installation, run the installation script in the Overleaf container with the following command:
+
+```bash
+$ bin/docker-compose exec sharelatex tlmgr install scheme-full
+```
+
+Alternatively you can install packages manually as you need by replacing `scheme-full` with the package name.
+
+Note that these changes made inside the `sharelatex` container with `docker exec` are ephemeral --- they will be lost if Compose recreates the container. To make them persistent, you can use `docker commit` to save the changes to a new docker image:
+
+```bash
+$ docker commit sharelatex sharelatex/sharelatex:with-texlive-full
+```
+
+Then add a `docker-compose.override.yml` file to the `config/` folder, and specify
+that the toolkit should use this new image to launch the `sharelatex` container in future:
+
+```yml
+---
+services:
+    sharelatex:
+        image: sharelatex/sharelatex:with-texlive-full
+```
+
+Then run `bin/stop && bin/docker-compose rm -f sharelatex && bin/up`, to recreate the container.
+
+Note that you will need to remove this committed container and repeat these steps when you [upgrade](./upgrading.md).
+
+Server Pro users have the option of using [Sandbox Compiles](./sandboxed-compiles.md), which will automatically pull down a full TexLive image. 
+