Adding join our community page to the header links in the community page

_config.yml

@@ -3,11 +3,12 @@ header_pages:
   - documentation/README.md
   - deploys/README.md
   - SECURITY.md
+  - join_our_community.md
 plugins:
   - jemoji
 github_username:  keeps
 title: RODA Community Edition
 tagline: Long-term digital preservation repository
 description: RODA (Repository of Authentic Digital Records) is a long-term digital repository solution that delivers functionalities for all the main functional units of the OAIS reference model. RODA is capable of ingesting, managing, and providing access to various types of digital content produced by large corporations and public bodies.
 author: KEEP SOLUTIONS
-logo: https://keeps.github.io/roda/roda-ui/roda-wui/src/main/resources/config/theme/favicon/favicon-black-196.png
+logo: https://keeps.github.io/roda/roda-ui/roda-wui/src/main/resources/config/theme/favicon/favicon-black-196.png