DirectoryIndex index.html

<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteBase /documentacao

    # You can also add other RewriteRules around here
    # Redirect 301 /oldurl /a-new-url.html

    RewriteRule ^index\.html$ - [L]
    ErrorDocument 404 /404.html

    # Do not redirect everything else to index, otherwise no 404 will be triggered
    #RewriteCond %{REQUEST_FILENAME} !-f
    #RewriteCond %{REQUEST_FILENAME} !-d
    #RewriteRule . /index.html [L]
</IfModule>