adding support for a collecto config file.

/scrutiny/config/collector.yaml

Adding ability to specify host identifier (label), that is updated on every collector run.
Can be specified by `host-id` CLI or `COLLECTOR_HOST_ID` env var.

Created a config class, interface and associated tests.

Created a "TransformDetectedDrives" function, that will allow users to insert drives not detected by Smarctl --scan, ignore drives that they dont want, and override smartctl device type.

Added Upsert functionality when registering devices.

Replaced "github.com/jinzhu/gorm" with "gorm.io/gorm" (ORM location moved, was using incorrect lib url)
Removed machineid library.

webapp/backend/cmd/scrutiny/scrutiny.go

@@ -60,7 +60,7 @@ OPTIONS:
 		},
 		Before: func(c *cli.Context) error {
 
-			drawbridge := "github.com/AnalogJ/scrutiny"
+			scrutiny := "github.com/AnalogJ/scrutiny"
 
 			var versionInfo string
 			if len(goos) > 0 && len(goarch) > 0 {
@@ -69,7 +69,7 @@ OPTIONS:
 				versionInfo = fmt.Sprintf("dev-%s", version.VERSION)
 			}
 
-			subtitle := drawbridge + utils.LeftPad2Len(versionInfo, " ", 65-len(drawbridge))
+			subtitle := scrutiny + utils.LeftPad2Len(versionInfo, " ", 65-len(scrutiny))
 
 			color.New(color.FgGreen).Fprintf(c.App.Writer, fmt.Sprintf(utils.StripIndent(
 				`