First, run apk add --no-cache curl
to install curl. Then run:
curl -L https://gist.githubusercontent.com/creepinson/fcd2dc09f614bf11c2aef6d3843d3b76/raw/318b451c5c350b7e159983cea435966770667c75/install.sh | bash
To install magic-wormhole.
If you just want to install the dependencies and not magic-wormhole itself you can run:
curl -L https://gist.github.com/creepinson/fcd2dc09f614bf11c2aef6d3843d3b76/raw/048459e0d4c0da3b9da90b2f9000618ced8fd7bf/install-dependencies.sh | bash