Start Contentz in local doesn't work

[Agustin N. R. Ramirez]

Describe the bug
When you want to start Contentz project in local, this doesn´t work because the scripts serve and build are incorrect.

To Reproduce
Steps to reproduce the behavior:

1. Clone repository
2. Install dependencies
3. Run yarn dev:build
4. See error

The same when you want to run yarn dev:serve, this throw a message like this

/bin/sh: serve: command not found

Expected behavior
Should build and serve the project

Screenshots

Desktop (please complete the following information):

• OS: macOS Mojave 10.14.5
• Browser [e.g. chrome, safari]: Chrome
• Version [e.g. 22]: 74.0.3729.157 (Official Build) (64-bit)

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
Add any other context about the problem here.