If you have docker installed you can build an image and run this as a container.
```
docker build -t mysherlock-image .
```
Once the image is built sherlock can be invoked by running the following:
```
docker run --rm mysherlock-image user123
```
The ```--rm``` flag is optional. It removes the container filesystem after running so you do not have a bunch of leftover container filesystem cruft. See https://docs.docker.com/engine/reference/run/#clean-up---rm
One caveat is the text file that is created will only exist in the container so you will not be able to get at that.