patch: logger functionality

[denelvis]

Standards checklist:

• The PR title is descriptive.
• The PR doesn't replicate another PR which is already open.
• The PR has self-explained commits history.

• The code is mine or it's from somewhere with an Apache-2.0 compatible license.
• The code is efficient, to the best of my ability, and does not waste computer resources.
• The code is stable and I have tested it myself, to the best of my abilities.
• If the code introduces new classes, methods, I provide a valid use case for all of them.

Changes:

• [...]

Other comments:

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[shpingalet007]

Localstorage data would not be logged. It contains crucial security data of user

[shpingalet007]

Before this PR can be accepted, linting edits in js/app.js need to be removed

[shpingalet007]

Quality checked