Function buildVarsHandler

buildVarsHandler(options: VarsHandlerOptions): CaddyRouteHandler
Build a vars handler for setting request variables
Parameters
- options: VarsHandlerOptions
  Vars handler configuration
Returns CaddyRouteHandler
Vars handler
Example
```
// Set custom variables for downstream handlers
const handler = buildVarsHandler({
  vars: {
    root: "/var/www",
    backend: "api-server",
    environment: "production",
  }
});
```
- Defined in src/caddy/routes.ts:1503