refactors minecraft jobs allowing for more flexibility in the future (e.g. adding an rcon web interface):
- split `minecraft.hcl` into multiple job files
- update ports used
- add consul service attached to mc and rcon ports
- remove `gate-proxy.hcl` static configuration - it is now consul aware via a consul template
- add fallback route on `gate-proxy` with message to inform users
- remove unused jobs
- move all minecraft jobs to use template blocks instead of env blocks for envvars - this lets us define the `RCON_PASSWORD` and store it in consul
