Add the configuration for Drone CI/CD to run E2E tests.

.drone.yaml

@@ -9,6 +9,7 @@ environment:
   DATABASE_HOST: postgres
   DATABASE_PORT: 5432
   SECRET_KEY_BASE: TestSecretKeycRZ1H45gfdAsdf8DIb45df4664mRCruzwVEF68wosddfg324ost
+  SELENIUM_REMOTE_URL: http://standalone-firefox:4444/wd/hub/
 
 steps:
   - name: install dependencies
@@ -49,4 +50,6 @@ services:
       POSTGRES_DB: link_shortener_dev
       POSTGRES_USER: postgres
       POSTGRES_PASSWORD: postgres
+  - name: standalone-firefox
+    image: selenium/standalone-firefox:129.0
 

config/test.exs

@@ -43,5 +43,8 @@ config :wallaby,
   otp_app: :link_shortener,
   screenshot_on_failure: true,
   screenshot_dir: "screenshots",
-  driver: Wallaby.Selenium
+  driver: Wallaby.Selenium,
+  selenium: [
+    remote_url: System.get_env("SELENIUM_REMOTE_URL", "http://localhost:4444/wd/hub/")
+  ]