I’m puzzled by the first line, the HTML framing. Why not just serve it `content-type: text/plain; charset=utf-8`?
BOM > HTTP charset > HTML meta charset
Also works for local files (not served over HTTP).
> You could skip the meta encoding declaration if you have a BOM, but we recommend that you keep it, since it helps people looking at the source code to ascertain what the encoding of the page is. [1]
[1] https://www.w3.org/International/questions/qa-html-encoding-...