HF Docker build: install wget for Spaces dev init step

Dockerfile

@@ -9,7 +9,9 @@
 FROM python:3.10-slim
 
 # 1. Install system tools as ROOT
-RUN apt-get update && apt-get install -y build-essential curl && rm -rf /var/lib/apt/lists/*
+# Include wget because Hugging Face's injected dev-init step fetches
+# OpenVSCode Server with wget during Space builds.
+RUN apt-get update && apt-get install -y build-essential curl wget && rm -rf /var/lib/apt/lists/*
 
 # 2. Setup the user but STAY as root for a moment
 RUN useradd -m -u 1000 user