Testnet deployment followup

[sisyphusSmiling]

Closes: #102

Description

• Updates deployment script addressing issues during Testnet deployment
• Updates flow.json aliases
• Adds Testnet deployment addresses to README

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For contributor use:

• Targeted PR against main branch
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Code follows the standards mentioned here.
• Updated relevant documentation
• Re-reviewed Files changed in the Github PR explorer
• Added appropriate labels

[sisyphusSmiling]

cc @bthaile @nialexsan for changes related to Flow Port

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.33%. Comparing base (8623710) to head (0c2899f).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #107   +/-   ##
=======================================
  Coverage   86.33%   86.33%           
=======================================
  Files          17       17           
  Lines         922      922           
=======================================
  Hits          796      796           
  Misses        126      126           

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