Rewrite all config file types on docker startup.
Example of parameters sources:
# Declare global section
# All parameters declared here will be
# available in all sections if not overwritten
[$global]
# Default placeholder boundaries, separated by space
$placeholder = #{{ }}
# Name of variable and value
GLOBVAR = 55
# Process a config file
[example/cfg1.conf]
# Overwrite default placeholder boundaries
$placeholder = %[[ ]]
PARAM = "simple string"
[example/cfg2.ini]
VALUE = "12345"
# Process a shell name pattern
# All files in this directory will be processed
[example/dir/*]
VAR = 1024
$placeholder = !<< >>