Greatly improve documentation + change app id + screenshots

[YummYume]

Description

No issue linked.

Type of change

Please add any relevant information to the type of change you've made.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update (or is a documentation update)
• HIGH IMPORTANCE (requires a fast merging)

Has This Been Tested?

Please describe the tests that you ran to verify your changes. It is way more likely for a PR to be merged and approved with successful tests.

• Yes, I ran tests
• No, I did not include any test
• No test is needed for this change

[gitguardian]

⚠️ GitGuardian has uncovered 2 secrets following the scan of your pull request.

Please consider investigating the findings and remediating the incidents. Failure to do so may lead to compromising the associated services or software components.

🔎 Detected hardcoded secrets in your pull request

GitGuardian id	GitGuardian status	Secret	Commit	Filename
11053357	Triggered	Generic High Entropy Secret	57880a2	.env	View secret
12834274	Triggered	Generic High Entropy Secret	57880a2	.env	View secret

🛠 Guidelines to remediate hardcoded secrets

1. Understand the implications of revoking this secret by investigating where it is used in your code.
2. Replace and store your secrets safely. Learn here the best practices.
3. Revoke and rotate these secrets.
4. If possible, rewrite git history. Rewriting git history is not a trivial act. You might completely break other contributing developers' workflow and you risk accidentally deleting legitimate data.

To avoid such incidents in the future consider

• following these best practices for managing and storing secrets including API keys and other credentials
• install secret detection on pre-commit to catch secret before it leaves your machine and ease remediation.

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^{🦉 GitGuardian detects secrets in your source code to help developers and security teams secure the modern development process. You are seeing this because you or someone else with access to this repository has authorized GitGuardian to scan your pull request.}