should implement project specific config support feature

[hoatle]

spec from #315

[hoatle]

let me check and improve minor things.

[hoatle]

@phuonglm bug detected:

macbook-pro:acme-dev hoatle$ vagrant rsync-back
==> default: Rsyncing folder: /home/vagrant/workspace/ => /Users/hoatle/acme-dev/workspace
==> default:   - Exclude: [".vagrant/", ".git", ".idea/", ".#*", "node_modules/", "dist/"]
macbook-pro:acme-dev hoatle$ cd workspace/nextjs-hello-world/
macbook-pro:nextjs-hello-world hoatle$ vagrant rsync-back
Error read file workspace/angular-hello-world/dev-setup/vagrant_config_default.json. Please check if that file exist. Exiting.

when $ vagrant sync-back not from acme-dev but with deeper folder level.

[hoatle]

@phuonglm I've updated the following branches that use the develop branch of teracy-dev for test the real use case of this feature:

• https://github.com/acme101/dev-setup/tree/develop
• https://github.com/acme101/angular-hello-world/tree/develop
• https://github.com/acme101/nextjs-hello-world/tree/develop

And I think that we should allow missing project config (just warning instead of fatal and exit), for example, from: https://github.com/acme101/dev-setup/blob/develop/vagrant_config_default.json#L5-L6

By that, users don't have to touch or override any configs, it should just work. What do you think?

[hoatle]

there is one use case in the future that teracy-dev will be splinted into a separated project (teracy-dev-setup that should have the same project layout with other projects and it should be configured as follows:

{
  "vagrant": {
    "config_paths": [ // add paths of json config files to be loaded
      // the path must be relative to the Vagrantfile
      "workspace/teracy-dev-setup/vagrant_config_default.json",
      "workspace/angular-hello-world/dev-setup/vagrant_config_default.json",
      "workspace/nextjs-hello-world/dev-setup/vagrant_config_default.json"
    ]
  }
}

that's it. It's the proof of the future compatibility 💃

[hoatle]

no more problems detected so far, so @phuonglm please check my comments above and fix, improve things.

[hoatle]

works as expected, closed now.

[hoatle]

reopened as there is bug: "override.json" instead of "overide.json"

[hoatle]

everything should work now, closed.