feat: upgrade to rc from abra

cli/upgrade.go

@@ -8,12 +8,24 @@ import (
 	"github.com/urfave/cli/v2"
 )
 
+var RC bool
+var RCFlag = &cli.BoolFlag{
+	Name:        "rc",
+	Value:       false,
+	Destination: &RC,
+	Usage:       "Insatll the latest Release Candidate",
+}
+
 // UpgradeCommand upgrades abra in-place.
 var UpgradeCommand = &cli.Command{
 	Name:  "upgrade",
 	Usage: "Upgrade abra",
+	Flags: []cli.Flag{RCFlag},
 	Action: func(c *cli.Context) error {
 		cmd := exec.Command("bash", "-c", "curl -s https://install.abra.coopcloud.tech | bash")
+		if RC {
+			cmd = exec.Command("bash", "-c", "curl -s https://git.coopcloud.tech/coop-cloud/abra/raw/branch/main/scripts/installer/installer | bash -s -- --rc")
+		}
 		logrus.Debugf("attempting to run '%s'", cmd)
 		if err := internal.RunCmd(cmd); err != nil {
 			logrus.Fatal(err)