Document docker setup with config file mounting

[ShahanaFarooqui]

Document docker setup with config file mounting

[FallingSnow]

I'm running into this issue to. The docker image overwrites the config on every start. I tried to bind the config as read only to prevent this but the image will no longer start due to the error below.

./docker-entrypoint.sh: line 4: can't create cl-rest-config.json: Read-only file system

[FallingSnow]

You unconditionally overwrite the file here:

c-lightning-REST/docker-entrypoint.sh

Lines 4 to 12 in 29de0b0

	cat <<-EOF > "cl-rest-config.json"
	{
	"PORT": $PORT,
	"DOCPORT": $DOCPORT,
	"PROTOCOL": "$PROTOCOL",
	"EXECMODE": "$EXECMODE",
	"RPCCOMMANDS": "$RPCCOMMANDS"
	}
	EOF

[FallingSnow]

A workaround for the time being (if you're using docker-compose) it to override the docker entrypoint. Add the following to your docker-compose.yml:

entrypoint: node cl-rest.js