Add Dockerfile to deploy AUTOMATIC1111 Stable Diffusion WebUI

Minimal Dockerfile for launching the Stable Diffusion WebUI on Hugging Face Spaces with GPU support. Uses Python 3 and CUDA base image.

Dockerfile

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+FROM nvidia/cuda:11.8.0-cudnn8-runtime-ubuntu22.04
+
+# Set up environment
+ENV DEBIAN_FRONTEND=noninteractive \
+    PYTHONUNBUFFERED=1 \
+    PIP_NO_CACHE_DIR=1 \
+    TZ=Etc/UTC
+
+RUN apt-get update && apt-get install -y \
+    git python3 python3-pip python-is-python3 \
+    libgl1 libglib2.0-0 wget curl \
+ && apt-get clean
+
+WORKDIR /app
+
+# Clone the repo (already in your space, so skip cloning)
+COPY . .
+
+# Install requirements
+RUN pip install -r requirements.txt
+
+# Launch the web UI
+CMD ["python3", "launch.py", "--listen", "--port", "7860", "--enable-insecure-extension-access"]