Add Dockerfile and README for HuggingFace Spaces deployment

- Dockerfile uses python:3.11-slim, runs gunicorn on port 7860 (HF Spaces requirement)
- README has HF Spaces metadata header (sdk: docker, app_port: 7860)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Dockerfile

@@ -0,0 +1,16 @@
+FROM python:3.11-slim
+
+RUN useradd -m -u 1000 user
+USER user
+ENV PATH="/home/user/.local/bin:$PATH"
+ENV HF_HOME=/home/user/.cache/huggingface
+
+WORKDIR /app
+
+COPY --chown=user requirements.txt requirements.txt
+RUN pip install --no-cache-dir --upgrade -r requirements.txt
+
+COPY --chown=user . /app
+
+EXPOSE 7860
+CMD ["gunicorn", "app:app", "--bind", "0.0.0.0:7860", "--timeout", "180", "--workers", "1", "--preload"]

README.md

@@ -0,0 +1,18 @@
+---
+title: Hate Speech Detector
+emoji: 🛡️
+colorFrom: red
+colorTo: yellow
+sdk: docker
+app_port: 7860
+pinned: false
+---
+
+# Hate Speech Detector
+
+DistilBERT + LoRA classifier for tweets, trained on the [tdavidson/hate_speech_offensive](https://huggingface.co/datasets/tdavidson/hate_speech_offensive) dataset.
+
+3-class classification:
+- **Hate Speech**
+- **Offensive Language**
+- **Neither**