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>

generate-config.sh

@@ -0,0 +1,19 @@
+#!/bin/sh
+# Generuje config.js z zmiennych środowiskowych (np. z pliku .env).
+set -eu
+
+if [ -n "${1:-}" ]; then
+  OUTPUT="$1"
+elif [ -d /usr/share/nginx/html ]; then
+  OUTPUT="/usr/share/nginx/html/config.js"
+else
+  OUTPUT="config.js"
+fi
+
+POST_VIDEO_REDIRECT_URL="${POST_VIDEO_REDIRECT_URL:-https://www.youtube.com/watch?v=kujXXtoHUbc}"
+
+cat > "$OUTPUT" <<EOF
+window.SLAVIC_PULSE_CONFIG = {
+  postVideoRedirectUrl: '${POST_VIDEO_REDIRECT_URL}'
+};
+EOF