update social media

Author: MarkWieczorek

_config.yml

@@ -18,7 +18,7 @@ tiles-count: 10
 # You need to restart jekyll for changes to have an effect
 socials:
   Mastodon: https://solarsystem.social/@IDF_Planets
-  Matrix: https://matrix.to/#/#IDF-Planets:matrix.org
+  Bluesky: https://bsky.app/profile/idf-planets.solarsystem.social
   GitHub: https://github.com/idf-planets
   Email: mailto:mark.wieczorek@ipgp.fr
   GitLab:

forum.md

@@ -0,0 +1,25 @@
+---
+layout: post
+title: Social Media
+description: Follow us on Mastodon and Bluesky, and migrate your Slack team to Mattermost
+image: assets/images/neptune.jpg
+image-show: false
+nav-menu: true
+show-tile: true
+order: 9
+---
+
+### Mastodon and Bluesky
+
+Ile-de-France Planets is on Mastodon and Bluesky! We post about planetary science events occurring in Ile-de-France, scientific discoveries made by researchers in our laboratories, and funding opportunities in Ile-de-France. If you would like to keep up to date with the planetary science activities in Ile-de-France, please consider following us.
+
+Mastodon: <a href="https://solarsystem.social/@IDF_Planets">@IDF_Planets</a>
+
+Bluesky: <a href="https://bsky.app/profile/idf-planets.solarsystem.social">@idf-planets.solarsystem.social</a>
+
+If you would like an account on the free, decentralized Mastodon network, sign up on the planetary science community instance <a href="https://solarsystem.social/">solarsystem.social</a>.
+
+
+### Mattermost
+
+If you are part of a community that is using Slack, please consider migrating to the Solar System Social Mattermost server. Mattermost is a free and open source team collaboration platform that is nearly identical to Slack. It doesn't suffer from any of the restrictions in the free Slack plan, and it is physically hosted using servers in France. Solar System Social will create a team for any early-career planetary science group or any planetary science community-led project. They will also create teams for other research projects on a case-by-case basis. If this interests you, please contact us on our social media accounts or by email.