Create a dot .env file inside the project root. Make sure to add the following content and repace values.
BASE_URL=http://localhost
CONTACT_MAIL=mail@example.com
CONTACT_PHONE="+49xx"
PRIVACY_CONTACT_PERSON="Firstname Lastname"
ADDRESS_NAME="Address Name"
ADDRESS_STREET="Address Street"
ADDRESS_HOUSE_NUMBER="House Number"
ADDRESS_POSTAL_CODE="Postal Code"
ADDRESS_CITY="City"
DB_PASS=postgres
DB_HOST=localhost
DB_USER=postgres
DB_NAME=postgres
DB_PORT=5432