Introducing a Route to access the POST codes

[matt-dahlgren]

Proposed Changes

Added the module Program.hs in app/Controllers/ to query the database to get a full list of POST codes in the database.
Added tests to simulate calls to an empty and populated (single entry and multiple entries) database.

...

Details

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[coveralls]

Pull Request Test Coverage Report for Build 43f2157c-600e-448a-8180-35c69b493c08

Details

• 6 of 6 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.06%) to 54.687%

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Totals
Change from base Build bfec1df0-12cd-4adb-a40a-5f0514531d1c:	0.06%
Covered Lines:	2187
Relevant Lines:	3934

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💛 - Coveralls

[david-yz-liu]

@matt-dahlgren nice work, I just left a few minor comments

[david-yz-liu]

This is an enhancement

[david-yz-liu]

All of the comments in this file need to be updated (they refer to courses, not programs)