Bind to [::] by default.

Author: stefansundin

config/puma.rb

@@ -14,8 +14,8 @@
 pidfile("#{app_path}/tmp/puma.pid")
 bind("unix://#{app_path}/tmp/puma.sock")
 
-# ENV["HOST"] = "[::]" # Use this to bind to IPv6
-ENV["HOST"] ||= "0.0.0.0"
+ENV["HOST"] ||= "[::]"
+# ENV["HOST"] ||= "0.0.0.0" # Use this to only bind to IPv4
 
 if ENV["PORT"]
   port(ENV["PORT"], ENV["HOST"])