fix: more robust docker context problem handling

See coop-cloud/organising#325
See coop-cloud/organising#340

cli/app/list.go

@@ -8,6 +8,7 @@ import (
 
 	"coopcloud.tech/abra/cli/internal"
 	"coopcloud.tech/abra/pkg/config"
+	"coopcloud.tech/abra/pkg/context"
 	"coopcloud.tech/abra/pkg/formatter"
 	"coopcloud.tech/abra/pkg/recipe"
 	"coopcloud.tech/abra/pkg/ssh"
@@ -97,6 +98,10 @@ can take some time.
 			alreadySeen := make(map[string]bool)
 			for _, app := range apps {
 				if _, ok := alreadySeen[app.Server]; !ok {
+					if err := context.HasDockerContext(app.Server); err != nil {
+						logrus.Fatal(err)
+					}
+
 					if err := ssh.EnsureHostKey(app.Server); err != nil {
 						logrus.Fatal(fmt.Sprintf(internal.SSHFailMsg, app.Server))
 					}