Update to the last flood version (4.1.2) and optimize start speed

[Coosos]

Update flood to 4.1.2

From flood 4.0.0, config file is modified.

• "pollInterval" is replaced by "torrentClientPollInterval"
• "torrentClientPollIntervalIdle" is required parameter because is forced by cli option* (default: '1000 * 60 * 15')
• "disableUsersAndAuth" is replaced by "authMethod"
• "floodServerHost" is required parameter because is forced by cli option* (default: '0.0.0.0')
• The "configUser" object changes to separate the connection type
• "secret" must contain at least 30 characters (https://github.com/jesec/flood/blob/master/CHANGELOG.md#410-november-17-2020)

Optimize start speed

In rootfs/usr/local/bin/run.sh, is not necessary to change owner for all files in /usr/flood because flood is build in /usr/flood/dist 😄

Now the container starts in 10 seconds 👍 (instead of many minutes 👎)

Note: su-exec is vulnerable (check: ncopa/su-exec#23)

[Wonderfall]

Thank you very much.

Note: su-exec is vulnerable

I agree, reducing privileges is vulnerable by design. It's better to use Docker namespaces and even better, Docker rootless (and even better, Podman, but it's still buggy IMO).

For now I intend to keep this image running that way so running as root is avoided at any cost. Reducing privileges is better than nothing at all! Docker security is a bit complex for the average user.