fix documentation URL

service/vault.md

@@ -86,15 +86,15 @@ services:
     container_name: vaultwarden
     restart: always
     environment:
-      DOMAIN: "https://vault.anarc.at"
+      DOMAIN: "https://vault.example.com"
       SIGNUPS_ALLOWED: "false"
       ROCKET_ADDRESS: "127.0.0.1"
       ROCKET_PORT: 8086
       IP_HEADER: "X-Forwarded-For"
       SMTP_PORT: 25
       SMTP_HOST: "localhost"
-      SMTP_FROM: "vault@anarc.at"
-      HELO_NAME: "vault.anarc.at"
+      SMTP_FROM: "vault@example.com"
+      HELO_NAME: "vault.example.com"
       SMTP_SECURITY: "off"
     env_file: "admin-token.env"
     volumes: