Create and deploy minFS config

[PI-Victor]

currently whenever you want to use the minfs fs driver, you need a config.json in /etc/ with an API version, a secret key and an access key, in a json format, that point to the Minio instance you're trying to connect to.
The step of provisioning this config should be done after we connect to the client with the access key and secret key provided as options when we mount the docker volume. This automatically validates them, making any actual validation unnecessary in the provisioning code.

[PI-Victor]

format of config.json

{
"version":"1",
"accessKey":"OKWUYY6OHNKMJB67WPU0",
"secretKey":"MWShkNCAlhmeDXdL6M3qb8N8lhAjM2ih83+pgjzD"
}