add user document model

Gemfile.lock

@@ -72,6 +72,9 @@ GEM
       momentjs-rails (~> 2.8)
       sassc-rails (~> 2.1)
       selectize-rails (~> 0.6)
+    administrate-field-active_storage (0.3.7)
+      administrate (>= 0.2.2)
+      rails (>= 6.0)
     annotate (3.1.1)
       activerecord (>= 3.2, < 7.0)
       rake (>= 10.4, < 14.0)
@@ -109,6 +112,8 @@ GEM
     dotenv-rails (2.7.6)
       dotenv (= 2.7.6)
       railties (>= 3.2)
+    enumerize (2.4.0)
+      activesupport (>= 3.2)
     erubi (1.10.0)
     ffi (1.15.3)
     globalid (0.5.2)
@@ -319,6 +324,7 @@ PLATFORMS
 
 DEPENDENCIES
   administrate
+  administrate-field-active_storage
   annotate
   bootsnap (>= 1.4.4)
   capybara
@@ -326,6 +332,7 @@ DEPENDENCIES
   devise-bootstrap-views
   devise-i18n
   dotenv-rails
+  enumerize
   graphql
   graphql_playground-rails
   httparty