added Dockerfile for marketplace API

market/backend/v1/market-api/Dockerfile

@@ -0,0 +1,25 @@
+# Docker config for the Selene skill service
+
+# The selene-shared parent image contains all the common Docker configs for
+# all Selene apps and services see the "shared" directory in this repository.
+FROM selene-shared:latest
+LABEL description="Run the API for the Mycroft marketplace"
+
+# Load the skill service application to the image
+COPY market_api /opt/selene/market_api
+WORKDIR /opt/selene/
+
+# Use pipenv to install the package's dependencies in the container
+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.
+RUN rm /opt/selene/Pipfile
+RUN rm /opt/selene/Pipfile.lock
+
+EXPOSE 5202
+
+# Use gunicorn to serve the API
+ENTRYPOINT ["gunicorn", "--bind=0.0.0.0:5002", "market_api.api:marketplace"]