Add Deno runtime for yt-dlp YouTube nsig challenge solving

Dockerfile

@@ -1,6 +1,6 @@
 FROM python:3.11-slim
 
-# System deps: FFmpeg, libs za OpenCV, Node.js za yt-dlp JS challenge
+# System deps: FFmpeg, libs za OpenCV, Node.js + unzip za Deno (yt-dlp JS challenge)
 RUN apt-get update && apt-get install -y --no-install-recommends \
     ffmpeg \
     libsm6 \
@@ -8,8 +8,14 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     libgl1 \
     curl \
     nodejs \
+    unzip \
+    ca-certificates \
     && rm -rf /var/lib/apt/lists/*
 
+# Deno runtime za yt-dlp YouTube nsig challenge solver
+RUN curl -fsSL https://deno.land/install.sh | DENO_INSTALL=/usr/local sh -s -- -y && \
+    deno --version
+
 WORKDIR /app
 
 # Python deps