Loading sample custom data instructions are broken

[wittrock]

While following the quickstart guide with the current stable version of datacommons-website-compose, I failed to load custom data on the admin page, with the following error message:

Input path must be a directory: /userdata/. If it is a GCS path, ensure it ends with a '/'.

The current stable release requires that the sample custom data is mapped at /userdata, but the current quickstart guide just suggests using $OUTPUT_DIR

This command fixes custom data loading for me:

docker run -it 
-p 8080:8080 
-e DEBUG=true 
--env-file $PWD/custom_dc/env.list 
-v $PWD/custom_dc/sample:/userdata
$DOCKER_IMAGE

[wittrock]

@kmoscoe notes that her upcoming PR will fix this: #469

Thanks Kara!