refactor!: consolidate SSH handling

Closes coop-cloud/organising#389.
Closes coop-cloud/organising#341.
Closes coop-cloud/organising#326.
Closes coop-cloud/organising#380.
Closes coop-cloud/organising#360.

cli/app/list.go

@@ -8,10 +8,8 @@ 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"
 	"coopcloud.tech/tagcmp"
 	"github.com/sirupsen/logrus"
 	"github.com/urfave/cli"
@@ -98,13 +96,6 @@ can take some time.
 			alreadySeen := make(map[string]bool)
 			for _, app := range apps {
 				if _, ok := alreadySeen[app.Server]; !ok {
-					if err := context.HasDockerContext(app.Name, app.Server); err != nil {
-						logrus.Fatal(err)
-					}
-
-					if err := ssh.EnsureHostKey(app.Server); err != nil {
-						logrus.Fatal(fmt.Sprintf(internal.SSHFailMsg, app.Server))
-					}
 					alreadySeen[app.Server] = true
 				}
 			}
@@ -114,7 +105,6 @@ can take some time.
 				logrus.Fatal(err)
 			}
 
-			var err error
 			catl, err = recipe.ReadRecipeCatalogue()
 			if err != nil {
 				logrus.Fatal(err)
@@ -212,6 +202,7 @@ can take some time.
 			}
 			allStats[app.Server] = stats
 		}
+
 		if internal.MachineReadable {
 			jsonstring, err := json.Marshal(allStats)
 			if err != nil {
@@ -221,6 +212,7 @@ can take some time.
 			}
 			return nil
 		}
+
 		alreadySeen := make(map[string]bool)
 		for _, app := range apps {
 			if _, ok := alreadySeen[app.Server]; ok {