feat: remove app docker job for integration tests

[olehbairak]

• created separate docker compose file
• removed app service
• added new filename

What ❔

Why ❔

Checklist

• PR title corresponds to the body of PR (we generate changelog entries from PRs).
• Tests for the changes have been added / updated.
• Documentation comments have been added / updated.

[github-actions]

API E2E Test Results

206 tests   - 1   206 ✅  - 1   28s ⏱️ ±0s
 14 suites ±0     0 💤 ±0 
  1 files   ±0     0 ❌ ±0 

Results for commit 3b5ebe0. ± Comparison against base commit 18205f5.

♻️ This comment has been updated with latest results.

[github-actions]

Visit the preview URL for this PR (updated for commit 3b5ebe0):

• https://staging-scan-v2--pr204-implement-docker-cac-n4vi9gvr.web.app
• https://staging-storybook-scan-v2--pr204-implement-docker-cac-9a5d3y7x.web.app

_{(expires Tue, 19 Mar 2024 13:44:52 GMT)}

_{🔥 via Firebase Hosting GitHub Action 🌎}

_{Sign: e508f9012944951194447cb8885950b451a24403}

[github-actions]

Unit Test Results

    4 files  ±0    263 suites  ±0   13m 30s ⏱️ +4s
2 079 tests  - 3  2 078 ✅  - 3  1 💤 ±0  0 ❌ ±0 
2 284 runs   - 6  2 283 ✅  - 6  1 💤 ±0  0 ❌ ±0 

Results for commit 3b5ebe0. ± Comparison against base commit 18205f5.

♻️ This comment has been updated with latest results.