Create a backup of a specified redis db to Google Cloud Storage
Set the following environment variables for the Docker container:
REDIS_HOST
Hostname of redis db
REDIS_PORT
Port of redis db
REDIS_PASSWORD
Password of redis db
GCS_BUCKET_REDIS
Google Cloud Storage bucket name
BACKUP_NAME
Name of the backup file, will be appended by the current date
GOOGLE_APPLICATION_CREDENTIALS
Path to mounted credentials file (google service account key json file)