Yarn is a new package manager for JavaScript. It is so faster than npm, which you can find [here](http://yarnpkg.com/en/compare).To install NodeJS and [Yarn](https://yarnpkg.com/) in the Workspace container:
1 - Open the `docker-compose.yml` file
2 - Search for the `INSTALL_NODE` and `INSTALL_YARN` argument under the Workspace Container and set it to `true`
It should be like this:
1 - Open the `.env` file
```yml
workspace:
build:
context: ./workspace
args:
- INSTALL_NODE=true
- INSTALL_YARN=true
...
```
2 - Search for the `WORKSPACE_INSTALL_NODE` and `WORKSPACE_INSTALL_YARN` argument under the Workspace Container and set it to `true`
3 - Re-build the container `docker-compose build workspace`
