Creating a ZeppelinOS project

Let's create a new project from scratch and use the ZeppelinOS development platform to write an upgradable contract:

1. Create the project folder:

$ mkdir project
$ cd project

2. Under the project folder, initialize the project with the npm package. Follow the instructions and provide the required parameter when asked by the command. This will create a package.json file:

$ npm init

3. Install the ZeppelinOS development platform command and the related files in the current project. This will install a zos command that we can use further:

$ npm install zos-lib@2.3.1 zos@2.3.1

4. Initialize the project with the zos command, as follows:

$ npx zos init project v1

This command will create two new files, called zos.json and truffle-config.js. The zos.json file is the configuration file for zos in which all the contract-related...