🐛 issues with docker networking and DNS resolution

[GitHK]

What do these changes do?

• Issue1: Using an overlay network for Envoy, will break its internal DNS resolver. Replaced overlay network with normal docker network.
• Issue2: Internal in house DNS domain server is never resolved but Envoy's DNS recover. Removed force search using TCP to solve queries. UDP is the default and what all servers support.
• Other: fixing typos regarding the envoy word.

Related issue/s

• followup to ✨block all user services outgoing traffic with exceptions #3606

How to test

Checklist

• Unit tests for the changes exist

[codecov]

Codecov Report

Merging #3826 (6f82c6d) into master (407bd60) will increase coverage by 2.7%.
The diff coverage is 11.1%.

@@            Coverage Diff            @@
##           master   #3826      +/-   ##
=========================================
+ Coverage    83.2%   85.9%    +2.7%     
=========================================
  Files         927     126     -801     
  Lines       39699    6338   -33361     
  Branches      836       0     -836     
=========================================
- Hits        33046    5447   -27599     
+ Misses       6446     891    -5555     
+ Partials      207       0     -207     

Flag	Coverage Δ
integrationtests	?
unittests	85.9% <11.1%> (+3.8%)	⬆️

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

Impacted Files	Coverage Δ
...2/src/simcore_service_director_v2/core/settings.py	98.4% <ø> (ø)
...v2/modules/dynamic_sidecar/docker_compose_specs.py	69.5% <ø> (ø)
...es/dynamic_sidecar/docker_compose_egress_config.py	56.7% <11.1%> (-1.1%)	⬇️
...server/src/simcore_service_webserver/login/_2fa.py
...rc/simcore_service_webserver/scicrunch/settings.py
...eb/server/src/simcore_service_webserver/statics.py
...s-library/src/models_library/services_resources.py
...ings-library/src/settings_library/utils_logging.py
.../simcore_sdk/node_ports_common/data_items_utils.py
...mcore_postgres_database/models/jinja2_templates.py
... and 797 more

[sanderegg]

If I get it right, you are testing these NAT rules before setting them?
Please check my comments.

[GitHK]

@sanderegg @pcrespov sorry. Just realised this morning what was happening with the DNS resolver. It required UDP and not TCP searching. That's why some servers were not resolving addresses.

[codeclimate]

Code Climate has analyzed commit 6f82c6d and detected 0 issues on this pull request.

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.2% Duplication