jdiamond

This unit file changes the OUI in the MAC addresses for enabled interfaces. It leaves the remaining bytes as is.

Copy oui@.service to /etc/systemd/system.

Enable it for each interface like this:

sudo systemctl enable oui@eth0
sudo systemctl enable oui@wlan0

jdiamond

"Injecting" configuration into a create-react-app is done with environmental variables. I always have at least one for the root of my REST API or GraphQL endpoint.

When running in development, I set that variable to point at a local version of the backend server I have running on my laptop. That's some other project that I do whatever I need to in order to get it running and available to accept requests from my React app.

If I wanted to start simple with static JSON files, maybe I would use something

jdiamond

FROM alpine

# Install OpenSSH:
RUN apk -U add openssh

# Generate host keys:
RUN ssh-keygen -A

# Create users:
RUN adduser -D user1

jdiamond

{
  "type": "module"
}