iCloud: replacement of harp lectures and assignments

As I do not do harp, we need to substitue all but an introductory leacture with something else. How many lectures are this

I sugegst to use cmd5 and azure, aws, docker, comet, ...

* [ ] introduction of harp
* [ ] how many lectures need to be replaced
* [ ] develop material for replacement lectures

* [ ] some lecture needs to deal with containers 