fix(docs): Update README: rename certProviderFunction to certProvisionFunction in configuration options for consistency.

ts/common/types.ts

@@ -77,9 +77,9 @@ export interface IDomainForwardConfig {
  * Unified ACME configuration options used across proxies and handlers
  */
 export interface IAcmeOptions {
+  accountEmail?: string;          // Email for Let's Encrypt account
   enabled?: boolean;              // Whether ACME is enabled
   port?: number;                  // Port to listen on for ACME challenges (default: 80)
-  contactEmail?: string;          // Email for Let's Encrypt account
   useProduction?: boolean;        // Use production environment (default: staging)
   httpsRedirectPort?: number;     // Port to redirect HTTP requests to HTTPS (default: 443)
   renewThresholdDays?: number;    // Days before expiry to renew certificates