Switch to Docker SDK to bypass Gradio SSR build hang

Add Dockerfile, change sdk from gradio to docker. Same app,
same API — just without HF's Gradio SSR build pipeline.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Dockerfile

@@ -0,0 +1,16 @@
+FROM python:3.12-slim
+
+RUN apt-get update && apt-get install -y git && rm -rf /var/lib/apt/lists/*
+
+RUN useradd -m -u 1000 user
+WORKDIR /app
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt gradio==6.9.0
+
+COPY . .
+
+USER user
+EXPOSE 7860
+
+CMD ["python", "app.py"]

README.md

@@ -3,11 +3,8 @@ title: AppSimple Assistant
 emoji: 💼
 colorFrom: blue
 colorTo: yellow
-sdk: gradio
-sdk_version: "6.9.0"
-app_file: app.py
+sdk: docker
 pinned: false
-python_version: "3.12"
 license: mit
 ---