feat(ui): add footer with links to docs and discussions

lib/postal/version.rb

@@ -1,11 +1,12 @@
 module Postal
-
-  VERSION = '1.0.0'
-  REVISION = nil
-  CHANNEL = 'dev'
+  VERSION_PATH = File.expand_path('../../VERSION', __dir__)
+  VERSION = if File.file?(VERSION_PATH)
+              File.read(VERSION_PATH).strip.delete_prefix('v')
+            else
+              '0.0.0-dev'
+            end
 
   def self.version
-    [VERSION, REVISION, CHANNEL].compact.join('-')
+    VERSION
   end
-
 end