Add Environment Configuration and Validation

[greatest0fallt1me]

Description
Centralize environment variables (PORT, DATABASE_URL, HORIZON_URL, SOROBAN_RPC_URL, JWT_SECRET, etc.) in src/config and validate required vars at startup. Use a schema (e.g. zod or env schema) so the app fails fast with a clear message if config is missing.

Requirements and context

• Must validate required env on boot
• Support .env files for local dev
• Document all env vars in README or .env.example

Suggested execution

• Fork the repo and create a branch
• git checkout -b feature/env-config
• Implement changes
  • Add src/config/env.ts (or similar): read process.env, validate required keys, export typed config
  • Create .env.example with all keys and placeholder values
  • Update src/index.ts to use config and exit with message if validation fails
• Test and commit
  • Run with missing env and verify error message; run with valid env and verify app starts
  • Example commit message: feat: env configuration and validation

Guidelines

• No secrets in repo; .env in .gitignore
• Clear documentation
• Timeframe: 96 hours
• Project details: #

[drips-wave]

This issue has been added to the Stellar Wave Program and is worth 200 Points.

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[Demilade01]

@Demilade01 has applied to work on this issue as part of the Stellar Wave Program's 2nd wave.

I will also like to work on this!

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[Praizleye]

@Praizleye has applied to work on this issue as part of the Stellar Wave Program's 2nd wave.

I would love to work on this issue. Kindly let me take it on.

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[ReinaMaze]

Hi, I’d like to work on this issue.
I have experience contributing to open source issues.
I’ve reviewed the description and understand what needs to be done.
Kindly assign this issue to me

ETA : 24 hours

[ayomideadeniran]

I'm a full-stack developer with experience building frontend applications, backend APIs, and blockchain/smart contract systems. I actively contribute to open source and focus on writing clean, maintainable, and secure code.

My approach would be to understand the existing architecture first, implement the required changes in a structured and scalable way, and ensure proper testing and documentation where needed.

ETA: 1–3 days (depending on scope)
Portfolio: https://knightsdev-portfolio.vercel.app/

[ryzen-xp]

Hi maintainers 👋
I’m a blockchain developer with strong expertise in Stellar, Rust,TS and Stellar SDK integrations. I’ve worked on multiple Stellar-based smart contract and backend systems.

I understand the scope of this issue and can deliver a reliable, production-quality solution with proper tests and documentation.
Plz assign me !!

ETA: 14 hours

[EbukaMoses]

Hello Maintainer,

I’d like to apply to work on this issue.

I’m Ebuka Moses, a full-stack and blockchain developer with experience building, testing, and maintaining smart contracts, particularly using Rust and blockchain-based architectures. I’m comfortable working with contract logic, validation, access control, persistent storage, and event handling, and I always pay close attention to correctness, security, and edge cases.

I take time to fully understand the issue requirements before implementing a solution, and I ensure my work follows the project’s coding standards. I also write clear, well-tested code and submit clean pull requests with meaningful commits.

I’m confident I can deliver a solid solution that meets the acceptance criteria and adds value to the project.

Thank you for your consideration, and I look forward to contributing.