It didn't use the volumes as parameter, instead it defined a service called volumes and services don't have a parameter called mongodb. Corrected indentation in yml file
See https://web.dev/external-anchors-use-rel-noopener/
Using noopener, as that addresses the security issue. "noreferer" blocks
the REFERER header, which may still be useful for some target URLs.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>