Uploading chapter 11 code examples

Chapter11/students_ms/Dockerfile

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+# Use the official lightweight Python image.
+# https://hub.docker.com/_/python
+FROM python:3.8-slim
+
+# Allow statements and log messages to immediately appear in the Knative logs
+ENV PYTHONUNBUFFERED True
+
+# Copy local code to the container image.
+WORKDIR /app
+COPY . ./
+
+# Install production dependencies.
+RUN pip install -r requirements.txt
+RUN pip install Flask gunicorn
+
+# Run the web service on container startup. Here we use the gunicorn
+# webserver, with one worker process and 8 threads.
+# For environments with multiple CPU cores, increase the number of workers
+# to be equal to the cores available.
+# Timeout is set to 0 to disable the timeouts of the workers to allow Cloud Run to handle instance scaling.
+CMD exec gunicorn --bind :$PORT --workers 1 --threads 8 --timeout 0 api_app:app