fix github actions to use geckodriver

.github/workflows/rubyonrails.yml

@@ -4,7 +4,7 @@ on:
   push:
     branches: [ "master" ]
   pull_request:
-    branches: [ "master" ]    
+    branches: [ "master" ]
 jobs:
   test:
     runs-on: ubuntu-latest
@@ -13,15 +13,11 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v3
-      - name: Setup chromedriver
-        uses: nanasess/setup-chromedriver@v2
-      - name: Start chromedriver
-        run: |
-             export DISPLAY=:99
-             chromedriver --url-base=/wd/hub &
+      - name: Setup geckodriver
+        uses: browser-actions/setup-geckodriver@latest
       - name: Install Ruby and gems
         uses: ruby/setup-ruby@v1
-        with:          
+        with:
           bundler-cache: true # runs 'bundle install' and caches installed gems automatically
           cache-version: 0 # Increment this number if you need to re-download cached gems
       - name: Set up database schema

spec/rails_helper.rb

@@ -100,6 +100,8 @@
       "text/csv,text/tsv,text/xml,text/plain,application/pdf,application/doc,application/docx,image/jpeg,application/gzip,application/x-gzip"
     options = Selenium::WebDriver::Firefox::Options.new
     options.profile = profile
+    options.args << "--headless" unless ENV["BROWSER"]
+
     Capybara::Selenium::Driver.new(
       app,
       browser: :firefox,