run.sh: Use `pwgen -s`
run.sh: Use `pwgen -s`

By default, `pwgen(1)` attempts to generate “pronouncable” passwords,
  which unfortunately have much lower entropy than one would expect.

The `-s` (“secure”) option makes it generate uniformly-random
  passwords, which is much safer.

hashbang/docker-mumble,pebble/docker-mumble