refactor: migrate from nginx to Caddy for admin and web services

[pratapalakshmi]

• Updated Dockerfiles to use Caddy as the web server instead of nginx.
• Added Caddyfile configurations for both admin and web services.
• Implemented rate limiting in Caddy using xcaddy.
• Adjusted healthcheck endpoint to reflect new routing in Caddy.

Description

Type of Change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] Feature (non-breaking change which adds functionality)
• [ ] Improvement (change that would cause existing functionality to not work as expected)
• [ ] Code refactoring
• [ ] Performance improvements
• [ ] Documentation update

Screenshots and Media (if applicable)

Test Scenarios

References

Summary by CodeRabbit

• Chores
  • Replaced web server across admin and web apps with Caddy-based deployment
  • Added built-in rate-limiting and improved logging to stdout
  • Preserved service port (3000) and existing health checks
  • Enhanced static file serving and SPA-friendly routing for client apps

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[coderabbitai[bot]]

Walkthrough

Replaces Nginx with Caddy for both admin and web apps: Dockerfiles now build a custom Caddy (xcaddy + ratelimit) and use Caddy in production; nginx.conf files were removed and new Caddyfile configs serve SPA static files on port 3000.

Changes

Cohort / File(s)	Summary
Dockerfiles (admin & web) apps/admin/Dockerfile.admin, apps/web/Dockerfile.web	Multi-stage Docker builds replaced Nginx deployment stage with an xcaddy builder stage and a Caddy production stage. Removes nginx references, copies built client into Caddy document root, updates healthcheck and CMD to run Caddy.
Caddy configurations apps/admin/caddy/Caddyfile, apps/web/caddy/Caddyfile	New Caddyfile(s) added: bind on port 3000, set trusted_proxies, serve static files from /usr/share/caddy/html with SPA-friendly fallback (try_files {path} /index.html), enable file_server, and log access to stdout.
Removed Nginx configs apps/admin/nginx/nginx.conf, apps/web/nginx/nginx.conf	Deleted existing Nginx configuration files and related server blocks and rate-limit/real-ip directives.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~22 minutes

• Check xcaddy build invocation and that the ratelimit module is included and compatible with the target Caddy version.
• Verify the built Caddy binary is copied correctly between stages and the runtime image has necessary permissions.
• Confirm Caddyfile SPA fallback (try_files {path} /index.html) matches the served file layout and index presence.
• Validate healthcheck URL, exposed port 3000, and CMD produce a healthy container start.
• Review removal of Nginx rate-limit/real-ip config to ensure equivalent behavior is implemented or intentionally omitted.

Poem

🐰 I hopped from nginx to Caddy's land,
Built with xcaddy by careful hand,
Static roots and tiny logs,
Rate limits watch like garden dogs,
A sprightly deploy—carrot in hand. 🥕

Pre-merge checks and finishing touches

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Description check	❓ Inconclusive	The description provides initial context for the changes but lacks completion of required template sections including type of change selection, test scenarios, and verification details.	Select appropriate change type(s), document test scenarios that verify the Caddy migration works correctly, and include any references to related issues or PRs.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately summarizes the main change: migrating from nginx to Caddy for admin and web services, which is clearly reflected in the changeset.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing touches

🧪 Generate unit tests (beta)

• [ ] Create PR with unit tests
• [ ] Post copyable unit tests in a comment

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📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 2edc11fe76e06d1c9f3b65dacf12e857975550a4 and e6731618948afe23e3b3744fb9409b7b52307c12.

📒 Files selected for processing (3)

• apps/admin/nginx/nginx.conf (0 hunks)
• apps/web/Dockerfile.web (1 hunks)
• apps/web/nginx/nginx.conf (0 hunks)

💤 Files with no reviewable changes (2)

• apps/web/nginx/nginx.conf
• apps/admin/nginx/nginx.conf

🚧 Files skipped from review as they are similar to previous changes (1)

• apps/web/Dockerfile.web

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (2)

• GitHub Check: Build packages
• GitHub Check: Analyze (javascript)

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