chore: update docker config

feat: add shlibs.arch to get name of the machines architecture, e.g. arm64, amd64

Changed wrong permissions function call

namespaced commands chown_directories and chmod_directories

Renamed `wait_for_postgres` and `wait_indefinitely` with shlibs namespace; old functions are still useable

Added files to create docker image on hub.docker.com for easy integration into new images

Fixed vault export error

Escaping vault result to prevent errors with spaces in the value, e.g. `The best password ever`

Improved info output on reloading shlibs

Fixed vault export in case the value contains spaces, e.g. JSON value

Fixed bugs in `run-init-scripts`; added parameter for init dirs `-s`

Added `shlibs.run-init-scripts` to run scripts in a dir with lexical ordering

Added user parameter to `wait_for_postgres`

Improved basic documentation

Added `shlibs.array.sort.unique`