wait for notebook to complete

[sanderegg]

What do these changes do?

wait until jupyter notebook completed execution

Bonus:

• add some healthchecks for postgres/redis

Related issue/s

How to test

Checklist

[codecov]

Codecov Report

Merging #2190 (f31e657) into master (50240e5) will increase coverage by 0.4%.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           master   #2190     +/-   ##
========================================
+ Coverage    73.1%   73.5%   +0.4%     
========================================
  Files         465     283    -182     
  Lines       17902   12886   -5016     
  Branches     1763    1353    -410     
========================================
- Hits        13090    9481   -3609     
+ Misses       4354    3019   -1335     
+ Partials      458     386     -72     

Flag	Coverage Δ
integrationtests	65.3% <ø> (-0.1%)	⬇️
unittests	64.4% <ø> (-2.1%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
.../simcore-sdk/src/simcore_sdk/node_data/__init__.py	0.0% <0.0%> (-100.0%)	⬇️
...core-sdk/src/simcore_sdk/node_data/data_manager.py	0.0% <0.0%> (-91.7%)	⬇️
...er/src/simcore_service_webserver/studies_access.py	24.2% <0.0%> (-64.5%)	⬇️
...er/src/simcore_service_webserver/login/handlers.py	27.9% <0.0%> (-59.9%)	⬇️
...mcore_service_webserver/login/api_keys_handlers.py	36.7% <0.0%> (-55.9%)	⬇️
...eb/server/src/simcore_service_webserver/statics.py	39.3% <0.0%> (-49.2%)	⬇️
...rc/simcore_service_webserver/login/confirmation.py	33.3% <0.0%> (-47.3%)	⬇️
...core_service_webserver/studies_dispatcher/_core.py	45.4% <0.0%> (-44.0%)	⬇️
...rc/simcore_service_webserver/login/registration.py	30.1% <0.0%> (-43.4%)	⬇️
...erver/src/simcore_service_webserver/application.py	51.3% <0.0%> (-41.7%)	⬇️
... and 228 more

[pcrespov]

nice addition!