If desired, you can add a custom host in your hosts file (e.g. 127.0.0.1 db).
Thus, the server config won't need any more configuration for production.
I recommend using docker because it's just one command and everything is up and running:
Run docker-compose -f docker-compose.dev.yml up.
This will fire up a mongodb, backend and frontend and watch files for your local changes.
Only if you prefer developing without using docker.
Run ./install.sh in the backend directory.
Run python app.py in backend root (will watch files and restart server on port 8081 on change).
In order to install new packages, add them to the requirements.txt file. If you run the watcher.py (default when using docker) they will be automatically installed in the background so you can use them in your app.
Only if you prefer developing without using docker.
Run yarn install in the frontend directory.
Run yarn start in frontend root (will watch files and restart dev-server on port 4200 on change).
All calls made to /api will be proxied to backend server (default port for backend 8081), this can be changed in proxy.conf.json.
Run docker-compose up in root. Will start four containers (mongodb, backend, frontend, nginx).