if [ -f "/.dockerenv" ] ||
grep "/docker/" /proc/1/cgroup -qa 2>/dev/null ||
grep -qai docker /proc/self/cgroup 2>/dev/null ||
[ "$(find / -maxdepth 3 -name '*dockerenv*' -exec ls -la {} \; 2>/dev/null)" ] ; then
inContainer="1"
containerType="docker\n"
fi