feat: update .gitignore, modify example .env file, and add Selenium stack deployment scripts

.env.example

@@ -5,4 +5,8 @@ TELEGRAF_MONGODB_DSN=mongodb://stats_user:%40z%5EVFhN7q%25vzit@tube.kobim.cloud:
 # MongoDB database name to store the data
 TELEGRAF_MONGODB_DATABASE=statistics
 # URL of the video to be analyzed
-VIDEO_URL=https://tube.kobim.cloud/w/iN2T8PmbSb4HJTDA2rV3sg
+VIDEO_URL=https://tube.kobim.cloud/w/eT1NZibmwMy6bx6N2YGLwr
+# Selenium Grid Hub URL
+#HUB_URL=http://localhost:4444
+# Socket port to send and listen for incoming data
+#SOCKET_PORT=8094