After firsttime starting it create automatic config.json

meshcentral-data/config.json

Root of config.json is always in ONE { }

{
                    "settings" : {
                        "cert":"mc.sidhosting.net"
                    }
    ...ROOT Json Configuration...
}

On Root Lavel

"letsencrypt": {
    "__comment__": "Requires NodeJS 8.x or better, Go to https://letsdebug.net/ first before trying Let's Encrypt.",
    "email": "info@siddiquie.net",
    "names": "your domain name",
    "production": true
  },

On Root Lavel

"sendgrid":{
    "from":"noreply@sidhosting.net",
    "apikey":"Your API key";
}