fix: ensure compose projects are spawned from the /tmp directory

A recent update to compose executes a stat call in the current working directory, which may have incorrect permissions for execution once the user is changed to the dokku user. This change forces all compose commands to execute in the /tmp directory by using a helper function to execute compose up/down.

Closes #7705

plugins/common/docker.go

@@ -11,6 +11,63 @@ import (
 	"time"
 )
 
+// ComposeUpInput is the input for the ComposeUp function
+type ComposeUpInput struct {
+	ProjectName string
+	ComposeFile string
+}
+
+// ComposeUp executes a docker compose up command
+func ComposeUp(input ComposeUpInput) error {
+	result, err := CallExecCommand(ExecCommandInput{
+		Command: DockerBin(),
+		Args: []string{
+			"compose",
+			"--file", input.ComposeFile,
+			"--project-name", input.ProjectName,
+			"up",
+			"--detach",
+			"--quiet-pull",
+		},
+		StreamStdio:      true,
+		WorkingDirectory: "/tmp",
+	})
+
+	if err != nil || result.ExitCode != 0 {
+		return fmt.Errorf("Unable to start compose project: %s", result.Stderr)
+	}
+
+	return nil
+}
+
+// ComposeDownInput is the input for the ComposeDown function
+type ComposeDownInput struct {
+	ProjectName string
+	ComposeFile string
+}
+
+// ComposeDown executes a docker compose down command
+func ComposeDown(input ComposeDownInput) error {
+	result, err := CallExecCommand(ExecCommandInput{
+		Command: DockerBin(),
+		Args: []string{
+			"compose",
+			"--file", input.ComposeFile,
+			"--project-name", input.ProjectName,
+			"down",
+			"--remove-orphans",
+		},
+		StreamStdio:      true,
+		WorkingDirectory: "/tmp",
+	})
+
+	if err != nil || result.ExitCode != 0 {
+		return fmt.Errorf("Unable to stop %s: %s", input.ProjectName, result.Stderr)
+	}
+
+	return nil
+}
+
 // ContainerIsRunning checks to see if a container is running
 func ContainerIsRunning(containerID string) bool {
 	b, err := DockerInspect(containerID, "'{{.State.Running}}'")