Docker Desktop double INT

Dockerfile

FROM ubuntu:20.04

COPY sig.sh /sig.sh
RUN chmod +x /sig.sh

STOPSIGNAL SIGINT

ENTRYPOINT ["/sig.sh"]

sig.sh

#!/bin/bash

trap "register" INT

register() {
    echo "INT"
    [ -z "$SIG" ] && SIG=1 || exit
}

while true; do
    sleep 100 &
    wait
done