Reduce final Docker image size (#2867)

* reduce final Docker image size

only copy the final documentation build
exclude unnecessary project files from

* ignore fixtures from Docker build

* include manage.py in final image

* copy files from docs image into runtime image

* include setup.cfg in final image build

* copy more onadata files to final image

* resolve savReaderWriter files not copied

Author: kelvin-muchiri

.dockerignore

@@ -17,6 +17,7 @@
 **/*tests
 **/*test
 **/*__pycache__
+**/*fixtures
 onadata/media
 onadata/test_data_media
 onadata/test_media

docker/onadata-uwsgi/Dockerfile.ubuntu

@@ -93,7 +93,13 @@ RUN apt-get install -y --no-install-recommends \
     && chown -R appuser:appuser /srv/onadata
 
 COPY --from=base /home/appuser/.pyenv/ /home/appuser/.pyenv/
-COPY --from=docs /srv/onadata/ /srv/onadata/
+# Copy only the files required in the final build
+COPY --from=docs /srv/onadata/docs/_build/html /srv/onadata/docs/_build/html
+COPY --from=base /srv/onadata/onadata/ /srv/onadata/onadata/
+COPY --from=base /srv/onadata/src/ /srv/onadata/src/
+COPY --from=base /srv/onadata/extras/ /srv/onadata/extras/
+COPY --from=base /srv/onadata/uwsgi.ini /srv/onadata/uwsgi.ini
+COPY --from=base /srv/onadata/manage.py /srv/onadata/manage.py
 COPY --from=base /usr/local/lib/ /usr/lib/
 
 RUN chown -R appuser:appuser /srv/onadata /home/appuser/.pyenv