Fix Railway deployment configuration

- Add .dockerignore to exclude frontend files from backend build
- Add railway.toml to configure subdirectory deployment
- Point Railway to backend/Dockerfile specifically

This should resolve the 'Cannot find module express' error during build.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: alanops

backend-only.tar.gz

@@ -0,0 +1,33 @@
+# Ignore everything outside backend directory
+../src
+../public
+../pages
+../components
+../styles
+../tests
+../tools
+../out
+../node_modules
+../.next
+../next.config.js
+../tailwind.config.js
+../postcss.config.js
+../tsconfig.json
+../package.json
+../package-lock.json
+
+# Ignore unnecessary files
+*.md
+.git
+.gitignore
+.env*
+node_modules
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Ignore build artifacts
+dist
+build
+.next
+out

backend/.dockerignore

@@ -0,0 +1,7 @@
+[build]
+  builder = "dockerfile"
+  dockerfilePath = "backend/Dockerfile"
+  
+[deploy]
+  startCommand = "npm start"
+  healthcheckPath = "/health"