chore: add resource under devops:artifcats:nexus

src/data/roadmaps/devops/content/118-artifcats/101-nexus.md

@@ -1 +1,6 @@
-# Nexus
+# Nexus
+
+- [Repository Management Basics](https://learn.sonatype.com/courses/nxrm-admin-100/)
+- [Nexus Installation and Configuration](https://learn.sonatype.com/courses/nxrm-config-100/)
+- [Nexus Repository Security Essentials](https://learn.sonatype.com/courses/nxrm-sec-100/)
+- [Nexus Best Practices](https://help.sonatype.com/repomanager3/nexus-repository-best-practices)