Upgrade to Ruby 3.0.6

Hey nice! We have to add webrick now because it's not included in Ruby 3, but hey just drop it right back in.

Idk how to choose between this or puma or whatever, but in the absence of a specific reason let's just pick the one whose name I know best.

.ruby-version

@@ -1 +1 @@
-2.6.10
+3.0.6

Gemfile

@@ -1,8 +1,11 @@
 source 'http://rubygems.org'
-ruby '2.6.10'
+ruby '3.0.6'
 
 gem 'rails', '= 6.1.7.4'
 
+# The HTTP server running the Rails instance.
+gem 'webrick', '~> 1.7'
+
 # Our database is MySQL, in both development and production.
 gem 'mysql2', '~> 0.5.5'
 

Gemfile.lock

@@ -301,6 +301,7 @@ GEM
       activemodel (>= 6.0.0)
       bindex (>= 0.4.0)
       railties (>= 6.0.0)
+    webrick (1.8.1)
     websocket-driver (0.7.6)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
@@ -341,10 +342,11 @@ DEPENDENCIES
   sass-rails (~> 5.0, >= 5.0.7)
   uglifier (~> 4.2)
   web-console (~> 4.2)
+  webrick (~> 1.7)
   will_paginate (~> 4.0)
 
 RUBY VERSION
-   ruby 2.6.10p210
+   ruby 3.0.6p216
 
 BUNDLED WITH
    2.4.18

Vagrantfile

@@ -75,7 +75,7 @@ Vagrant.configure("2") do |config|
     apt-get install -y libmysqlclient-dev libcurl4-openssl-dev nodejs
     su vagrant -c 'git clone https://github.com/rbenv/rbenv.git ~/.rbenv'
     su vagrant -c 'git clone https://github.com/rbenv/ruby-build.git ~/.rbenv/plugins/ruby-build'
-    su vagrant -c '~/.rbenv/bin/rbenv install 2.6.10 && ~/.rbenv/shims/gem update --system'
+    su vagrant -c '~/.rbenv/bin/rbenv install 3.0.6 && ~/.rbenv/shims/gem update --system'
     apt-get install -y mysql-server
     mysql -e "CREATE USER IF NOT EXISTS openneo_impress IDENTIFIED BY 'openneo_impress';"
     mysql -e "CREATE DATABASE IF NOT EXISTS openneo_impress;"