Fixed issues with app.rb require

Description

When trying to launch the app if the `LOAD_PATH` was not properly set
the unicorn server was unable to load the `app.rb` source
file. Updated to use the `expand_path` method from the File class.

Done

Assignee

Unassigned

Reporter

Open Source Pull Request Bot

Contributor Name

Tobias Macey

Repo

edx/cs_comments_service

Customer

Epic Link

None

OSCM Assignee

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Platform Map Area (Levels 1 & 2)

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Platform Map Area (Levels 3 & 4)

None

Blended Hour Utilization Percentage

None

edX Theme

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edX Squad

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Github Lines Added

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Github Lines Deleted

None

Priority

Unset