Falls back to defaultHtmlTemplate when none is configured, warning once. A build always
sets one, so reaching the fallback means either a test (where it is the point) or a build that did
not run (where an unstyled page plus one warning beats a page that cannot render at all).
Get the HTML template for the React application.
Falls back to defaultHtmlTemplate when none is configured, warning once. A build always sets one, so reaching the fallback means either a test (where it is the point) or a build that did not run (where an unstyled page plus one warning beats a page that cannot render at all).