You can use docker-compose to easily start app.
First of all, install docker-compose if you don't have it on your machine. Make sure you follow all prerequisites.
Second, you should create .env file with following content (example):
POSTGRES_PASSWORD=your_postgres_password
PRIVATE_API_PATH=http://bonsay_api:3020/api/
Now, you can execute this commands:
# create custom network to connect front-end and back-end (optional)
docker network create bonsay
# build containers and run application
docker-compose -f docker-compose.dev.yaml up