Add Railway deployment configuration

Author: aaron-seq

railway.toml

@@ -0,0 +1,18 @@
+[build]
+builder = "nixpacks"
+buildCommand = "npm run build:web"
+watchPatterns = ["web/**"]
+
+[deploy]
+startCommand = "npm start"
+restartPolicyType = "on_failure"
+restartPolicyMaxRetries = 3
+
+[env]
+NODE_ENV = "production"
+PORT = "3000"
+
+[healthcheck]
+path = "/health"
+intervalSeconds = 30
+timeoutSeconds = 10