Trying to stream to and from uberspace via nodejs and jsmpeg

I am trying to stream video data to and from uberspace via nodejs and jsmpeg.

My problem is that I'm getting a 404 when trying to access the url:

The requested URL /receive was not found on this server.

The url I am accessing is like this: https://stream.mydomain.com/receive

and this is my .htaccess:

DirectoryIndex disabled
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^send/(.*) http://localhost:61624/$1
RewriteRule ^receive/(.*) ws://localhost:61625/$1
</IfModule>

from Trying to stream to and from uberspace via nodejs and jsmpeg