Update ruby Docker tag to v3

Reviewed-on: #81

Dockerfile

@@ -1,4 +1,4 @@
-FROM ruby:2.7.4-alpine3.12
+FROM ruby:3.0.2-alpine3.12
 
 EXPOSE 4000
 

Gemfile

@@ -1,6 +1,6 @@
 source "https://rubygems.org"
 
-ruby "2.7.4"
+ruby "3.1.2"
 
 gemspec
 

src/_posts/2022-07-11-endorsing-battle-mesh-v14.md

@@ -0,0 +1,45 @@
+---
+layout: post
+title: Wireless Battle of the Mesh - Building Community Networks for Fun and Non-Profit
+description: Autonomic members are aiming to attend. Here is our public endorsement!
+image: bmesh.png
+category: community, wireless, event
+date: 2022-07-11
+---
+
+Autonomic Co-op supports this year's "Wireless Battle of the Mesh - Building
+Community Networks for Fun and Non-Profit".
+
+The event aims to bring together people from across the globe who are
+interested in community networks, including wireless mesh network technologies,
+fiber infrastructure, Do-It-Yourself Internet Access Providers, and more
+generally how to create and maintain a thriving community of people involved in
+building their own networks.
+
+We envision 4 days of expert presentations, practical workshops, hacking
+sessions, and fruitful discussions: whether you are a mesh networking
+enthusiast, community networking activist, protocol developer, or have an
+interest in networking in general, come and join the event!
+
+The Battlemesh is free of charge and open for all.
+
+This year, the event will take place from Monday 19th to Wednesday 22nd
+of September, 2022 in Rome, Italy! It will be followed by the RomHack
+Camp on September 23-25, also in Rome.
+
+Check out more information [here](https://www.battlemesh.org/BattleMeshV14).
+
+We are writing this post as part of a public endorsement and support for
+"Wireless Battle of the Mesh - Building Community Networks for Fun and
+Non-Profit" not only for the efforts made by its community to advance the field
+of wireless mesh networking and foster the development of grass-roots community
+networks, but for their contribution to digital freedom rights movement,
+empowerment of peoples tech/net/media competency and a free and open civil
+society.
+
+We aim to support the event by:
+
+- helping to promote it
+- making it possible for our members to join the event
+
+See you there hopefully!