document running mvn test + docker compose

``` diff
diff --git a/docker-compose.yml b/docker-compose.yml
index d0d8d6e..6bd31ae 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -38,6 +38,8 @@ services:
restart: always
image: mongo:3.4
command: mongod --setParameter="internalQueryExecMaxBlockingSortBytes=335544320"
+ ports:
+ - "27017:27017"
volumes:
- type: volume
source: mongo
@@ -45,8 +47,8 @@ services:
sparql:
restart: always
## For debugging, expose the Fuseki port by enabling:
-# ports:
-# - "3030:3030"
+ ports:
+ - "3030:3030"
## To find the admin password, try:
## docker-compose exec sparql grep admin /fuseki/shiro.ini
image: stain/jena-fuseki:3.4.0
```

```
docker compose down
docker compose up

# in a new terminal
mvn test
```

Can this be done without editing `docker-compose.yml`?