add optional authorized team configuration

[robandpdx]

This pull request introduces an option to configure an AUTHORIZED_TEAM which the application will check the users membership of in order to act. The changes are centered around the app.js file, with corresponding updates to the README.md, template.yml, and test.js files to reflect the new functionality.

The main changes include:

Authorization Mechanism:

• app.js: Added an authorization check to various actions such as opening a pull request, adding a comment, and adding the EMERGENCY_LABEL. This check verifies if the user performing the action is a member of the authorized team specified in the AUTHORIZED_TEAM environment variable. If the user is not authorized, a comment is posted on the PR and the emergency label is removed if it was added. This authorization mechanism is implemented in the isAuthorized() function. [1] [2] [3] [4] [5] [6]

• README.md: Updated the documentation to explain the new AUTHORIZED_TEAM environment variable and the authorization mechanism.

• template.yml: Added the AUTHORIZED_TEAM parameter to the AWS SAM template. [1] [2]

Test Cases:

• test.js: Updated and added new test cases to cover the new authorization mechanism. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27]

[github-actions]

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[pmartindev]

LGTM 👍