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/cp.go

@@ -14,6 +14,7 @@ import (
 	"coopcloud.tech/abra/pkg/formatter"
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/api/types/filters"
+	dockerClient "github.com/docker/docker/client"
 	"github.com/docker/docker/pkg/archive"
 	"github.com/sirupsen/logrus"
 	"github.com/urfave/cli"
@@ -43,6 +44,11 @@ And if you want to copy that file back to your current working directory locally
 	Action: func(c *cli.Context) error {
 		app := internal.ValidateApp(c)
 
+		cl, err := client.New(app.Server)
+		if err != nil {
+			logrus.Fatal(err)
+		}
+
 		src := c.Args().Get(1)
 		dst := c.Args().Get(2)
 		if src == "" {
@@ -88,28 +94,24 @@ And if you want to copy that file back to your current working directory locally
 				logrus.Fatalf("%s does not exist locally?", dstPath)
 			}
 		}
-		err := configureAndCp(c, app, srcPath, dstPath, service, isToContainer)
-		if err != nil {
+
+		if err := configureAndCp(c, cl, app, srcPath, dstPath, service, isToContainer); err != nil {
 			logrus.Fatal(err)
 		}
-		return nil
 
+		return nil
 	},
 	BashComplete: autocomplete.AppNameComplete,
 }
 
 func configureAndCp(
 	c *cli.Context,
+	cl *dockerClient.Client,
 	app config.App,
 	srcPath string,
 	dstPath string,
 	service string,
 	isToContainer bool) error {
-	cl, err := client.New(app.Server)
-	if err != nil {
-		logrus.Fatal(err)
-	}
-
 	filters := filters.NewArgs()
 	filters.Add("name", fmt.Sprintf("^%s_%s", app.StackName(), service))