Add a docker-compose.yml for local development

[james2177]

Description

Local dev currently means npm install && npm run dev against in-memory state — there's no docker-compose.yml anywhere in the repo. Once persistence (category C) introduces a real datastore dependency, contributors need one command to stand up the full local stack.

Requirements and context

• Should include the backend service plus whatever datastore lands from issue Add integration tests against a local Soroban sandbox #36, wired via the existing .env.example conventions

Suggested execution

1. Fork the repo and create a branch

   git checkout -b dx/docker-compose-local-dev
   

2. Implement changes
   Relevant files:

• docker-compose.yml

3. Test and commit

   • Run npm run lint && npm run typecheck && npm test && npm run test:e2e
   • Include test output / screenshots or logs demonstrating the fix in the PR

   Example commit message:

   feat: add docker-compose setup for local development
   

Guidelines

• Assignment required before starting — comment to claim this issue
• PR description must include: Closes #[this issue's number]
• Timeframe: 96 hours from assignment
• Complexity: High (200 points)

---

Part of the Drips Wave for vortex-backend.

[laurentketterle-hub]

I would like to work on this issue. @laurentketterle-hub has applied to work on this issue.

[sam-boyega]

@sam-boyega has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

The problem outlined here is something I’ve handled before with good results. I’m eager to contribute and deliver a well-structured solution. Please assign this issue to me.

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

[afeezorobsco-cyber]

@afeezorobsco-cyber has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

i would like to work on this issue, PR in 20 mins

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

[kulkan-IV]

@kulkan-IV has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

hi team kindly assign me i can work on this issue am a pro dev

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

[drips-wave]

Congratulations, @kulkan-IV! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @kulkan-IV: 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.

Warning

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