Updated Chrome settings

- Adds `--headless`
- Removes shared-memory related settings and disables shm

After doing this, I'm able to run the feature tests. Before adding the headless option I still had trouble with frequent Selenium Chrome crashes, but not since. In any case, those are "resolved" by running `docker compose restart selenium` and re-running the tests.

docker-compose.yml

@@ -50,7 +50,6 @@ services:
       - 4444:4444
       - 7900:7900
     platform: linux/amd64
-    shm_size: 3g
     networks:
       default:
         aliases:

spec/rails_helper.rb

@@ -16,13 +16,15 @@
 
 Capybara.register_driver(:remote) do |app|
   chrome_args = %w[
-    --window-size=2560,1344
+    --disable-dev-shm-usage
     --disable-smooth-scrolling
+    --headless
+    --window-size=2560,1344
   ]
 
   chrome_prefs = {
     'download.prompt_for_download' => false,
-    'download.default_directory' => '/tmp',
+    'download.default_directory' => '/tmp'
   }
 
   chrome_options = ::Selenium::WebDriver::Chrome::Options.new(args: chrome_args, prefs: chrome_prefs).tap do |options|