Add visible version

This is to be able to track which instances (including the main one)
have which fixes

src/app.cr

@@ -3,6 +3,7 @@ require "./shards"
 # Load the asset manifest
 Lucky::AssetHelpers.load_manifest "public/mix-manifest.json"
 
+require "./version"
 require "../config/server"
 require "../config/**"
 require "./app_database"

src/components/shared/layout_footer.cr

@@ -3,7 +3,12 @@ class Shared::LayoutFooter < BaseComponent
     section do
       footer do
         para do
-          a "Source code", href: "https://sr.ht/~edwardloveall/scribe"
+          span do
+            a "Source code", href: "https://sr.ht/~edwardloveall/scribe"
+          end
+          span do
+            text "Version: #{Scribe::VERSION}"
+          end
         end
       end
     end

src/css/app.css

@@ -30,3 +30,7 @@ figure iframe {
     background: rgba(221, 221, 221, 0.3);
   }
 }
+
+footer p span {
+  margin-right: 1em;
+}

src/version.cr

@@ -0,0 +1,3 @@
+module Scribe
+  VERSION = "2022-01-04"
+end