Add root Dockerfile for Space build

Dockerfile

@@ -0,0 +1,19 @@
+FROM python:3.12-slim
+
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1 \
+    PORT=8000
+
+WORKDIR /app
+
+COPY pyproject.toml README.md openenv.yaml ./
+COPY support_ticket_env ./support_ticket_env
+COPY server ./server
+COPY inference.py ./inference.py
+
+RUN pip install --no-cache-dir --upgrade pip && \
+    pip install --no-cache-dir .
+
+EXPOSE 8000
+
+CMD ["python", "-m", "server.app"]