Chat consists of:

• chat-server to serve data
• chat-web web client server
• chat-mobile mobile app

First you need to run chat-server:

• Install Node. For your convenience use nvm.
• Install yarn
• Proceed to chat-server directory
• Install dependencies: $ yarn
• Build and start app: $ yarn build:start

Next you need to start web client server chat-web:

• Proceed to chat-web directory
• Install dependencies: $ yarn
• Then proceed to http://localhost:3000
• Fill new user credential and press Sign Up. After you can Sign Out and use these credentials to Log In.
• Open in another browser or tab using other credentials and check chat functionality.

You can seamlessly use same functionality through mobile app for iOS and Android

• Proceed to chat-mobile directory
• Install dependencies: $ yarn
• Start iOS app: $ yarn ios
• You can also start Android app: $ yarn android (you need open emulator for this)
• Use existing user to Log In or create new one for app.