Prevent .compose volumes from being doubly included in docker (#1367)

docker-compose maps in ./.compose/* in the host source tree to the neo4j
container so that neo4j data can be persisted on each container re-run.

dev.Dockerfile copies in the contents of everything on the host source
tree, and that also includes the contents of .compose, which can get
very big.

This PR makes sure that we don't include .compose in the dev.Dockerfile
so that the size stays manageable.

.dockerignore

@@ -1,3 +1,6 @@
 build/
 *.egg-info/
 venv/
+.compose
+.cache
+.local