Tidy up makefile, add mongo shell command

Makefile

@@ -1,35 +1,39 @@
 default: services test
 
+.PHONY: test
 test:
 	go test ./...
-.PHONY: test
 
+.PHONY: test_docker
 test_docker:
 	docker-compose run --rm golang make test
-.PHONY: test_docker
 
+.PHONY: cover
 cover:
 	go list -f '{{if len .TestGoFiles}}"go test -coverprofile={{.Dir}}/.coverprofile {{.ImportPath}}"{{end}}' ./... | xargs -L 1 sh -c
-.PHONY: cover
 
+.PHONY: publish_cover
 publish_cover: cover
 	go get -d golang.org/x/tools/cmd/cover
 	go get github.com/modocache/gover
 	go get github.com/mattn/goveralls
 	gover
 	@goveralls -coverprofile=gover.coverprofile -service=travis-ci -repotoken=$(COVERALLS_TOKEN)
-.PHONY: publish_cover
 
+.PHONY: services
 services:
 	docker-compose pull mongo redis gpubsub
 	docker-compose up -d mongo redis gpubsub
-.PHONY: services
 
+.PHONY: stop
 stop:
 	docker-compose down
-.PHONY: stop
 
+.PHONY: clean
 clean:
 	@find . -name \.coverprofile -type f -delete
 	@rm -f gover.coverprofile
-.PHONY: clean
+
+.PHONY: mongo_shell
+mongo_shell:
+	docker run -it --network eventhorizon_default --rm mongo:4.2 mongo --host mongo test