Add post-video redirect to YouTube URL from env config.

After the intro finishes, users are redirected to POST_VIDEO_REDIRECT_URL loaded via generated config.js for dev, Docker, and Dokploy deployments.

Co-authored-by: Cursor <cursoragent@cursor.com>

docker-compose-example/docker-compose.yml

@@ -18,6 +18,9 @@ services:
     ports:
       - "${FRONTEND_PORT:-8080}:80"
 
+    environment:
+      POST_VIDEO_REDIRECT_URL: ${POST_VIDEO_REDIRECT_URL:-https://www.youtube.com/watch?v=kujXXtoHUbc}
+
     command: >
       sh -c "
         apk add --no-cache git &&
@@ -28,6 +31,8 @@ services:
         cp -r /app/assets /usr/share/nginx/html/assets &&
         rm /etc/nginx/conf.d/default.conf &&
         cp /app/default.conf /etc/nginx/conf.d/default.conf &&
+        chmod +x /app/generate-config.sh &&
+        POST_VIDEO_REDIRECT_URL=\"$${POST_VIDEO_REDIRECT_URL}\" /app/generate-config.sh /usr/share/nginx/html/config.js &&
         nginx -g 'daemon off;'
       "