I get a 404 when trying to access the rxjs.umd.min.js file. I have the docker container up and running, but I get a 404 response from the script tag in my index.html file.
Thanks for reporting. We recently removed the rxjs from the container and instead use a CDN. This is a bug.
We will be updating the tutorial this weekend. Thanks for reporting here also.
For those interested the tutorial has been updated: