Works around https://github.com/pterodactyl/panel/issues/3096 (which couldn't be reproduced at the time, presumably due to no one happening to run EL) by adding documentation of alternative location for CA certs. The location of CA certificates varies by distribution. Debian/Ubuntu and derivatives use /etc/ssl/certs as the location for CA certs, but that path is hardcoded into the official Wings image, so adding an alt path to mount is the next best thing.
Without having the correct cert location, you can fall back to the one inside the container of course, but it's preferable to use the host's. I don't know about other distros, but I found what is necessary for it to work on EL. By default, on EL, an x509 error occurs and Wings is unreachable.
* update docker configs
dockerfile with an updated start command
docker-compose file adds custom network name so it can be used in firewalld commands.
* update compose file
mount changes
remove /srv/daemon-data
remove /etc/timezone
variable changes
add TZ
* add note about old data folder.
* update to go 1.15
Update base image to go version 1.15
