Add axe-core for accessibility testing

Gemfile

@@ -176,6 +176,9 @@ group :test do
   gem "webmock"
   # FIXME: stop using `mock_model` and remove this
   gem "rspec-activemodel-mocks"
+  # For automated accessibility testing
+  gem "axe-core-capybara"
+  gem "axe-core-rspec"
 end
 
 group :development do

Gemfile.lock

@@ -111,6 +111,20 @@ GEM
       aws-sigv4 (~> 1.6)
     aws-sigv4 (1.6.0)
       aws-eventstream (~> 1, >= 1.0.2)
+    axe-core-api (4.8.0)
+      dumb_delegator
+      virtus
+    axe-core-capybara (4.8.0)
+      axe-core-api
+      dumb_delegator
+    axe-core-rspec (4.8.0)
+      axe-core-api
+      dumb_delegator
+      virtus
+    axiom-types (0.1.1)
+      descendants_tracker (~> 0.0.4)
+      ice_nine (~> 0.11.0)
+      thread_safe (~> 0.3, >= 0.3.1)
     base64 (0.1.1)
     bcrypt (3.1.19)
     better_errors (2.10.1)
@@ -165,6 +179,8 @@ GEM
       xpath (~> 3.2)
     chunky_png (1.4.0)
     coderay (1.1.3)
+    coercible (1.0.0)
+      descendants_tracker (~> 0.0.1)
     colorize (1.1.0)
     compass (1.0.3)
       chunky_png (~> 1.2)
@@ -196,6 +212,8 @@ GEM
     date (3.3.3)
     dbf (4.2.4)
     debug_inspector (1.1.0)
+    descendants_tracker (0.0.4)
+      thread_safe (~> 0.3, >= 0.3.1)
     devise (4.9.2)
       bcrypt (~> 3.0)
       orm_adapter (~> 0.1)
@@ -210,6 +228,7 @@ GEM
     dotenv-rails (2.8.1)
       dotenv (= 2.8.1)
       railties (>= 3.2)
+    dumb_delegator (1.0.0)
     elasticsearch (7.17.7)
       elasticsearch-api (= 7.17.7)
       elasticsearch-transport (= 7.17.7)
@@ -335,6 +354,7 @@ GEM
       multi_xml (>= 0.5.2)
     i18n (1.14.1)
       concurrent-ruby (~> 1.0)
+    ice_nine (0.11.2)
     jb (0.8.0)
     jmespath (1.6.2)
     jquery-rails (4.6.0)
@@ -670,6 +690,7 @@ GEM
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
     thor (1.2.2)
+    thread_safe (0.3.6)
     tilt (2.2.0)
     timecop (0.9.8)
     timeout (0.4.0)
@@ -696,6 +717,10 @@ GEM
       activesupport (>= 5.2.0, < 8.0)
       concurrent-ruby (~> 1.0)
       method_source (~> 1.0)
+    virtus (2.0.0)
+      axiom-types (~> 0.1)
+      coercible (~> 1.0)
+      descendants_tracker (~> 0.0, >= 0.0.3)
     warden (1.2.9)
       rack (>= 2.0.9)
     webdrivers (5.3.1)
@@ -736,6 +761,8 @@ DEPENDENCIES
   atdis
   autoprefixer-rails
   aws-sdk-s3 (~> 1)
+  axe-core-capybara
+  axe-core-rspec
   better_errors
   binding_of_caller
   bootsnap