[CI] No workflow builds the backend Docker image, so Dockerfile/compose breakages ship undetected

[grantfox-oss]

Telegram (ask questions / claim the issue here first): https://t.me/+DOylgFv1jyJlNzM0

Why this matters

There are three workflows (ci.yml, security.yml, pr-test-gate.yml) and none runs docker build on backend/Dockerfile or docker compose build. Because backend tests run via vitest against src/, the compiled dist/ runtime path and the image are never exercised in CI - which is why a broken production image can merge green.

Acceptance criteria

• Add a CI job that runs docker build -f backend/Dockerfile backend (and optionally docker compose build)
• Optionally boot the image and curl /health to catch missing-runtime-file regressions
• Run the job on PRs that touch backend/ or Docker files

Files to touch

• .github/workflows/ci.yml
• backend/Dockerfile
• docker-compose.yml

Out of scope

• Pushing images to a registry
• Multi-arch builds

[AbuJulaybeeb]

hi maintainer,
i would like to take on this issue

[heymide]

@heymide has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Interested in working on this issue. I'll implement the requested changes and ensure everything is properly tested before submission.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @heymide to this issue.

[Meet-hybrid]

@Meet-hybrid has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hello, I’m interested in contributing to this task.

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[grantfox-oss]

🦊 GrantFox — @david87131 has been assigned to this issue!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #889)
2. Your PR will be reviewed by the LabsCrypt maintainers

Good luck! Track your progress on GrantFox.

[drips-wave]

Congratulations, @david87131! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

🧑‍💻 @david87131: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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[olufunsoolutayo]

@olufunsoolutayo has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hello Maintainer. I would be grateful to resolve this issue. Please assign to me. Thank you

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[Nursca]

@Nursca has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hello I would like to work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Nursca to this issue.