Enable unprivileged start

[fluktuid]

Feature Request

As an administrator I want to be be able to start this container unprivileged.

Current situation

the entrypoint.sh script is

• trying to chown the SIGNAL_CLI_CONFIG_DIR
• uses exec setpriv …

this causes issues issues when run without privileges

solution

check wether uid and gid are also the target SIGNAL_CLI_UID and SIGNAL_CLI_GID. If so, just start signal-cli-rest-api