postgresql 13 to 16 in readme and docker yml

[james-at-kc]

Description:

Upgrading postgreSQL from 13.x to 16

Technical Details:

Required due to db restore using PG version 16

Requirements for PR Merge:

1. Unit & integration tests updated
2. API documentation updated (examples listed below)
   1. API Contracts
   2. API UI
   3. Comments
3. Data validation completed (examples listed below)
   1. Does this work well with the current frontend? Or is the frontend aware of a needed change?
   2. Is performance impacted in the changes (e.g., API, pipeline, downloads, etc.)?
   3. Is the expected data returned with the expected format?
4. Appropriate Operations ticket(s) created
5. Jira Ticket(s)
   1. DEV-0

Explain N/A in above checklist:

[aguest-kc]

I'm not sure if anyone went over our PR flow. For normal tickets, like this one, you should base your branch off of qat and then open the PR into qat. Hotfixes are based off of the staging branch and go into staging first.

I just wanted to mention that, because this PR is open into master.