HTML not working in some browsers
Hi. during testing I noticed that some browsers display the explorer site as text with all the HTML code, so the site is not displayed as expected. The only browsers where the HTML is working are Firefox based (FF, Tor browser..) and lynx. "Bad browsers" (tested by me) are chrome/chromium , opera, brave, links...


command:
`links http://localhost:8081`

result:
```

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <META HTTP-EQUIV="CACHE-CONTROL" CONTENT="NO-CACHE">
    <title>Onion Monero Blockchain Explorer</title>
    <!--<link rel="stylesheet" type="text/css" href="/css/style.css">-->
    <style type="text/css">
body {
    margin: 0;
    padding: 0;
    color: white;
    background-color: black;
}

h1, h2, h3, h4, h5, h6 {
    text-align: center;
}
...
```
Do you have similar problems with chrome or opera? 

Maybe Hint? 
I tried to save the site from browser to notebook and the saved file has no extension. When I rename the file to file.html, the HTML code is working even in chrome . Seems like some browsers are not able to recognize that it is HTML site (perhaps because of missing extension). Do you have any idea?