Add/configure ActiveStorage

Gemfile.lock

@@ -182,6 +182,9 @@ GEM
     hashdiff (1.0.1)
     i18n (1.14.1)
       concurrent-ruby (~> 1.0)
+    image_processing (1.12.2)
+      mini_magick (>= 4.9.5, < 5)
+      ruby-vips (>= 2.0.17, < 3)
     importmap-rails (1.1.6)
       actionpack (>= 6.0.0)
       railties (>= 6.0.0)
@@ -220,6 +223,7 @@ GEM
     marcel (1.0.2)
     matrix (0.4.2)
     method_source (1.0.0)
+    mini_magick (4.12.0)
     mini_mime (1.1.2)
     minitest (5.18.0)
     multipart-post (2.3.0)
@@ -337,6 +341,8 @@ GEM
     rubocop-ast (1.29.0)
       parser (>= 3.2.1.0)
     ruby-progressbar (1.13.0)
+    ruby-vips (2.1.4)
+      ffi (~> 1.12)
     ruby2_keywords (0.0.5)
     rufus-scheduler (3.9.1)
       fugit (~> 1.1, >= 1.1.6)
@@ -435,6 +441,7 @@ DEPENDENCIES
   flipper
   flipper-active_record
   flipper-ui
+  image_processing (~> 1.12.2)
   importmap-rails
   jbuilder (~> 2.7)
   letter_opener