Support Sink Enabled

[vbjay]

{
  "Serilog": {
    "Using": [
      "Serilog.Sinks.Console",
      "Serilog.Sinks.File",
      "Serilog.Enrichers.Environment",
      "Serilog.Sinks.Seq"
    ],
    "MinimumLevel": {
      "Default": "Debug",
      "Override": {
        "Microsoft": "Information",
        "System": "Information"
      }
    },
    "WriteTo": [
      {
        "Name": "Console",
        "Args": {
          "outputTemplate": "===> {Timestamp:HH:mm:ss} [{Level}] {Message}{NewLine}{Exception}"
        }
      },
      {
        "Name": "File",
        "Args": {
          "Path": "<folder>\\ServiceReports.log",
          "rollingInterval": "Day",
          "flushToDiskInterval": "00:00:10",
          "outputTemplate": "===> {Timestamp:HH:mm:ss} [{Level}] [{MachineName}] | {Message}{NewLine}{Exception}"
        }
      },
      {
        "Name": "Seq", // Name of the Seq sink
        "Args": {
          "serverUrl": "<seqHost>:5341",
          "apiKey": "<apikey>"
        },
        "Enabled": true 
      }
    ],
    "Enrich": [
      "FromLogContext",
      "WithMachineName",
      "WithThreadId"
    ],
    "Properties": {
      "Application": "ServiceReports"
    }
  },
 ...
}

Support reading enabled property to enable/disable sinks so we can deploy different config based on environment. We can for example set something like this in octopus deploy