[proposal] Openshift deployment guide updated
[proposal] Openshift deployment guide updated

[proposal] Openshift deployment guide updated.

When deploying to OpenShift, Sails Grunt hook should be disabled in `.sailsrc` file. 
All grunt tasks will run by supervisor, before Sails will be lifted. 

First we create file  `.openshift/action_hooks/pre_start_nodejs`
```
#!/bin/bash
export NODE_ENV=production

if [ -f "${OPENSHIFT_REPO_DIR}"/Gruntfile.js ]; then
    (cd "${OPENSHIFT_REPO_DIR}"; node_modules/grunt-cli/bin/grunt prod)
fi
```

This will run tasks from /tasks/register/prod.js  every time when server lifts. 
So, we need to disable Grunt hook, to  prevent  task execution again.
yoshioka-s/sails-docs-ja