Tweak install deps script to allow installers to be run in series as well as parallel

Author: Glen Pike

README.md

@@ -41,6 +41,12 @@ git clone https://github.com/CoderDojo/cp-local-development.git && cd cp-local-d
 ./install_deps.sh
 ```
 
+The dependency script runs all of the installations in parallel which may have issues on some machines / networks.  For a slower, but steadier way, use the following:
+
+```
+./install_deps.sh --series
+```
+
 You may have permission errors on Windows in which case you need to change
 ownership to yourself.
 

install_deps.sh

@@ -2,5 +2,17 @@
 
 set -e
 
-docker-compose -f docker-compose.yarn.yml up
-docker-compose -f docker-compose.yarn.yml down
+if [[ "$1" == "--series" ]];
+then
+  containers=("zen" "frontend" "badges" "dojos" "events"
+    "eventbrite" "organisations" "users" "events_service"
+    "users_service" "clubs_service" "email_service")
+  
+  for container in ${containers[@]};
+  do
+    docker-compose -f docker-compose.yarn.yml run yarn_${container}
+  done
+else
+  docker-compose -f docker-compose.yarn.yml up
+  docker-compose -f docker-compose.yarn.yml down
+fi