Netcat doesn't exist in cluster but part of documentation for alerting

[xamox]

Outlined in the docs:
https://github.com/falcosecurity/falco/wiki/Falco-Alerts#program-output-sending-alerts-to-network-channel

It's using nc (netcat) as part of the alerting mechanism.

But using latest image:

> sudo docker images                                                                                                                                                         Fri 05 Oct 2018 11:11:32 AM EDT
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
sysdig/falco        latest              2608233e59ea        3 weeks ago         685MB

You can see it is not installed here:

> sudo docker run -it --entrypoint=/bin/sh sysdig/falco -c nc                                                                                                         5.7s  Fri 05 Oct 2018 11:09:33 AM EDT
/bin/sh: 1: nc: not found

Curl appears to exist though

> sudo docker run -it --entrypoint=/bin/sh sysdig/falco -c curl                                                                                                     1092ms  Fri 05 Oct 2018 11:09:58 AM EDT
curl: try 'curl --help' or 'curl --manual' for more information

And from within that container (image):

# find / -type f -name 'nc' 
/usr/share/bash-completion/completions/nc

[mstemm]

When we originally wrote those examples, we were using falco installed directly on the host instead of in a container. But you bring up a good point that it might be useful to have netcat in the falco container as well, so it would be possible to handle generic event forwarding. Addressed in #456.

[xamox]

Great, thanks!