Rebuild Shuffle structure for docker image builds

backend/app_gen/python-lib/baseline/Dockerfile

@@ -0,0 +1,26 @@
+# Base our app image off of the WALKOFF App SDK image
+FROM frikky/shuffle:app_sdk as base
+
+# We're going to stage away all of the bloat from the build tools so lets create a builder stage
+FROM base as builder
+
+# Install all alpine build tools needed for our pip installs
+RUN apk --no-cache add --update alpine-sdk libffi libffi-dev musl-dev openssl-dev 
+
+# Install all of our pip packages in a single directory that we can copy to our base image later
+RUN mkdir /install
+WORKDIR /install
+COPY requirements.txt /requirements.txt
+RUN pip install --prefix="/install" -r /requirements.txt
+
+# Switch back to our base image and copy in all of our built packages and source code
+FROM base
+COPY --from=builder /install /usr/local
+COPY src /app
+
+# Install any binary dependencies needed in our final image - this can be a lot of different stuff
+RUN apk --no-cache add --update libmagic
+
+# Finally, lets run our app!
+WORKDIR /app
+CMD python app.py --log-level DEBUG