fix: simplify Dockerfile for HF Spaces

Dockerfile

@@ -1,24 +1,16 @@
 FROM python:3.11-slim
 
-# HF Spaces expects port 7860
-EXPOSE 7860
-
 WORKDIR /app
 
-# Install deps
 COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
 
-# Copy source
-COPY env/     ./env/
-COPY api/     ./api/
-COPY inference.py .
-COPY openenv.yaml .
+COPY . .
 
-# Environment variables (override at runtime)
 ENV API_BASE_URL="https://api.openai.com/v1"
 ENV MODEL_NAME="gpt-4o-mini"
 ENV HF_TOKEN=""
 
-# Start FastAPI server
-CMD ["uvicorn", "api.main:app", "--host", "0.0.0.0", "--port", "7860"]
+EXPOSE 7860
+
+CMD ["uvicorn", "api.main:app", "--host", "0.0.0.0", "--port", "7860"]