Update digest-score to run new model

ml/digest-score/Dockerfile

@@ -0,0 +1,13 @@
+FROM python:3.8-slim
+
+WORKDIR /app
+
+ENV GRPC_PYTHON_BUILD_SYSTEM_OPENSSL "1"
+ENV GRPC_PYTHON_BUILD_SYSTEM_ZLIB "1"
+
+COPY . /app
+
+RUN pip install --no-cache-dir -r requirements.txt
+
+EXPOSE 5000
+CMD ["python", "serve.py"]