Deployment fails when there are 10 or more Docker containers running #37

MSMBP:nodejs-hello-world M$ git push platform master
Counting objects: 407, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (321/321), done.
Writing objects: 100% (407/407), 216.88 KiB | 0 bytes/s, done.
Total 407 (delta 57), reused 403 (delta 56)
-----> Cleaning up...
-----> Building nodejs-hello-world from buildstep...
-----> Adding BUILD_ENV to build environment...
-----> Injecting apt repositories and packages ...
-----> Node.js app detected

-----> Creating runtime environment

       NPM_CONFIG_LOGLEVEL=error
       NPM_CONFIG_PRODUCTION=true
       NODE_MODULES_CACHE=true

-----> Installing binaries
       engines.node (package.json):  0.12.2
       engines.npm (package.json):   unspecified (use default)

       Downloading and installing node 0.12.2...
       Using default npm version: 2.7.4

-----> Restoring cache
       Loading 1 from cacheDirectories (default):
       - node_modules

-----> Building dependencies
       Pruning any extraneous modules
       Installing node modules (package.json + shrinkwrap)

-----> Caching build
       Clearing previous node cache
       Saving 1 cacheDirectories (default):
       - node_modules

-----> Build succeeded!
       └── express@4.13.3

-----> Discovering process types
       Procfile declares types -> web
-----> Releasing nodejs-hello-world...
-----> Deploying nodejs-hello-world...
-----> Running pre-flight checks
       For more efficient zero downtime deployments, create a file CHECKS.
       See http://progrium.viewdocs.io/dokku/checks-examples.md for examples
       CHECKS file not found in container: Running simple container check...
-----> Waiting for 10 seconds ...
remote: App container failed to start!!
=====> nodejs-hello-world container output:
       Detected 512 MB available memory, 512 MB limit per process (WEB_MEMORY)
       Recommending WEB_CONCURRENCY=1
       Node app is running at localhost:5000
=====> end nodejs-hello-world container output
remote: /usr/local/bin/dokku: line 49:  1524 Killed                  dokku deploy "$APP"
To ssh://dokku@vskylabs.local:8022/nodejs-hello-world
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'ssh://dokku@vskylabs.local:8022/nodejs-hello-world'