Fallback on js_url

Hello,

in the esphome webserver I have js_url set to a file on HA

web_server:
  port: 80
  js_url: https://<mydomain>:8123/local/esphome/v2/www.js
  auth:
    username: admin
    password: !secret web_server_password

this is to protect my privacy, and also to make sure the esphome webinterface is still accessible if my internet or the esphome site goes down.

now you never guess,
my home assistant is down, and with it, the webinterface of all my esphome devices.
is there a way to add a fallback url in case the first one breaks?
like?

web_server:
  port: 80
  js_url: https://<mydomain>:8123/local/esphome/v2/www.js
  js_url2: https://esphome.io/_static/webserver-v1.min.js
  auth:
    username: admin
    password: !secret web_server_password

[edit:] I know about js_include but space on some of my devices is already limited.