Added docker-compose.override.yml for development purposes

The newly added docker-compose.override.yml file overrides
settings in docker-compose.yml for development purposes. In
particular:
  - the source code will be mounted into the container for
    live reloading during the development
  - dejavu is used as gui for elasticsearch for debugging
    purposes
  - cors is enabled in elasticsearch for usage with dejavu

These settings will automatically be used when executing:
 $ docker-compose up

If you, however, don't want to use these settings (e.g. in
production) use:
 $ docker-compose -f docker-compose.yml up

For further information please refer to:
https://docs.docker.com/compose/extends/#multiple-compose-files

Signed-off-by: Max Magorsch <max@magorsch.de>

1 files changed, 5 insertions, 1 deletions

diff --git a/docker-compose.yml b/docker-compose.yml
index 7c10720..d3d5d58 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,5 +1,5 @@
 
-version: '2'
+version: '3.2'
 # p.g.o consists nominally of:
 # A service to sync the tree to $TREE_DIR && update the index.
 # The index updater simply submits work items into sidekiq.
@@ -11,6 +11,10 @@ version: '2'
 #  - Elasticsearch: runs the elasticsearch service.
 #  - Redis: Run Redis for Sidekiq.
 #  - Refresher: Syncs the package tree and pushes updates into sidekiq.
+#
+# For further information about usage during development / production
+# please refer to docker-compose.override.yml
+#
 services:
   http-serving:
     # Build from Dockerfile in .