Parend Dockerfile for Selene services and APIs

shared/Dockerfile

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+# Parent dockerfile for all Selene services and APIs
+#
+# This Dockerfile contains the steps that are common to building all the
+# docker images for the Selene backend to Mycroft
+
+FROM python:3.7
+LABEL maintainer="Mycroft AI <devops@mycroft.ai>"
+
+# Install the software required for this image
+RUN pip install pipenv
+
+# Copy the applicaction code to the image
+COPY selene_util /opt/selene/selene_util
+WORKDIR /opt/selene/
+
+# Use pipenv to install the dependencies for selene-util
+COPY Pipfile Pipfile
+COPY Pipfile.lock Pipfile.lock
+RUN pipenv install --system
+
+# Now that pipenv has installed all the packages required by selene-util
+# the Pipfile can be removed from the container.  This makes way for the
+# pepenv to use these files to install dependencies for the Selene services
+# or applications that will use this Docker config
+RUN rm /opt/selene/Pipfile
+RUN rm /opt/selene/Pipfile.lock