suricata repo outdated

[eliasgrana]

Description

I have tested this guide from a Oracle Linux 7 system. I was able to install Suricata but on a outdated version (4.1.10) that has a known CVE vulnerability (CVE-2021-37592). The Suricata repo provided on this guide doesn't exist anymore. Thus, I propose to change to the latest repo (https://copr.fedorainfracloud.org/coprs/g/oisf/suricata-6.0/repo/epel-7/group_oisf-suricata-6.0-epel-7.repo).

Also, some references from the Suricata documentation might be useful for additional configurations like changing the monitoring interface (by default, Suricata monitors eth0). https://suricata.readthedocs.io/en/suricata-6.0.0/configuration/suricata-yaml.html

Checks

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• [x] Spelling and grammar.
• [x] Used impersonal speech.
• [x] Used uppercase only on nouns.
• [ ] Updated the redirect.js script if necessary (check this guide).

Note to the reviewer

This PR includes changes to the redirect.js script that need to be included in all production branches.