Update configuration.py to use LOGGING environment variable
Update configuration.py to use a LOGGING environment variable to allow LOGGING configuration to be set via docker-compose.
LOGGING environment variable should be set to the full dictionary - example below:
`LOGGING: "{'version': 1, 'disable_existing_loggers': False, 'formatters': { 'timestamp': { 'format': '{asctime} {levelname} {message}', 'style': '{', }, }, 'handlers': { 'netbox-auth': { 'level': 'DEBUG', 'class': 'logging.FileHandler', 'formatter': 'timestamp', 'filename': '/var/log/netbox/netbox-auth.log', }, 'netbox': { 'level': 'DEBUG', 'class': 'logging.FileHandler', 'formatter': 'timestamp', 'filename': '/var/log/netbox/netbox.log', }, }, 'loggers': { 'netbox.auth': { 'handlers': ['netbox-auth'], 'level': 'DEBUG', }, 'django_auth_ldap': { 'handlers': ['netbox-auth'], 'level': 'DEBUG', }, 'netbox.views': { 'handlers': ['netbox'], 'level': 'DEBUG', }, 'netbox.api.views': { 'handlers': ['netbox'], 'level': 'DEBUG', }, },}"`
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