Deployment / launching of PHP program (Slim 4), excluding Bitrix24

Assistance is needed to understand how the ready PHP application works (a simple device that turns on and off the light above the workspace, also bills for time and sends data for payment), and to deploy (launch) it on a subdomain of a separate server. It is necessary to ensure the full functionality works correctly.
The main goal is to determine the role of integration with Bitrix and completely eliminate this dependency.

The application is written in PHP using Slim 4, Guzzle, PDO, Symfony Cache.

What needs to be done

1. Deployment of the project and launch

• Deploy the project on a subdomain (subdomain is already configured);

• Configure the web server (Apache or Nginx) — partially ready, may need to install some modules (server support can assist);

• Install dependencies via Composer;

• Configure connection to MySQL;

• Verify that the API works and returns responses.

2. Architecture analysis

• Briefly describe the project structure: controllers, models, interaction with lamps (DOMIQ), GoPos terminal;

• Explain how the game start/stop, lighting control, and data transfer for payment work.

3. Excluding Bitrix

• Find all parts of the code related to Bitrix;

• Explain what Bitrix is used for (initially — storing reservations and customer data);

• Confirm that Bitrix can be excluded without losing core functionality (game, lighting, payment);

• Implement a local alternative: storing reservations and customers in a MySQL database.

Additional

The application accesses external services for IP (DOMIQ, POS), so basic understanding of network settings and firewall operation may be required.

Work result

• The application is deployed and running on a subdomain;

• Provide a brief description of the architecture and operating principles (documentation);

• Provide a clear explanation of the role of Bitrix24 and confirmation of its exclusion possibility;

• Implement a local system for storing reservations and customers.

Ready to consider your actual proposals regarding price and deadlines.