backstage/.changeset/great-zebras-hunt.md

@backstage/cli

@backstage/cli
patch

The app build process now outputs an additional index.html.tmpl file. This is an non-templated version of the index.html file, which can be used to delay templating until runtime.

The new index.html.tmpl file also sets a backstage-public-path meta tag to be templated at runtime. The meta tag is in turn picked up by the new @backstage/cli/config/webpack-public-path.js entry point script, which uses it to set the runtime public path of the Webpack bundle.