Copy .env.example, rename the copy to .env and change the variables inside as you want them.
To install the frontend you need to use NodeJS to run the application locally and install packages used.
To setup the project for the first time, in the /frontend folder, run npm i.
Following this, run npm run dev to run the local environment.
Install dotnet (dotnet9)
To run the backend go to the /backend folder and run dotnet run.