Unfortunately I experience some issues.
When going to http://domain.tld, the request is redirected to https://www.domain.tld (per Namecheap setting)
Then, when https://www.domain.tld is served by Helio, I receive cross-origin error because the files are served from https://domain.tld instead of the redirected https://www.domain.tld.
Adding https://domain.tld redirect to https://www.domain.tld does not work, because Namecheap can redirect secure connection to only different domain.tld.
https://www.namecheap.com/support/knowledgebase/article.aspx/385/2237/how-to-set-up-a-url-redirect-for-a-domain/
I assume that for similar reasons, https://domain.tld redirect to https://www.domain.tld does not work.
Therefore, is the only option as follows?
1 Namecheap A Racord @ Helio's server IP address
2.1 configure .htaccess to redirect http://domain.tld to https://www.domain.tld
2.2 configure .htaccess to redirect https://domain.tld to https://www.domain.tld