Click on Deploy to Salesforce button to deploy the application to your sandbox or production.

After deployment, please follow below steps and configure app & tabs visibility

1. Go to setup --> App Manager and click on Edit for "Capgemini Tech Challenge 2018" app.
2. Click on User profiles and select profiles to make app visible.
3. Go to Setup --> Profiles and update "Accounts", "Account Edit Delete" & "Account Mass Edit Delete" tabs visiblity to "Default Off"

Video Demo

https://youtu.be/Pue22fzMgAY