cd to / and defang down before deploying

to deprovision any previously deployed projects for this tenant

Author: jordanstephens

tools/testing/deployer/deployer.go

@@ -155,6 +155,37 @@ func (d *CliDeployer) RunDeployTest(ctx context.Context, t test.TestInfo) (*test
 		},
 	}
 
+	wkdir, err := os.Getwd()
+	if err != nil {
+		return nil, fmt.Errorf("failed to get current working directory: %w", err)
+	}
+	err = os.Chdir("/")
+	if err != nil {
+		return nil, fmt.Errorf("failed to change working directory: %w", err)
+	}
+	_, err = d.RunCommand(cmdCtx, func(cmd *exec.Cmd) {
+		if t.Stdout != nil {
+			cmd.Stdout = io.MultiWriter(&d.Stdout, t.Stdout, detector)
+		} else {
+			cmd.Stdout = io.MultiWriter(&d.Stdout, detector)
+		}
+		if t.Stderr != nil {
+			cmd.Stderr = io.MultiWriter(&d.Stderr, t.Stderr, detector)
+		} else {
+			cmd.Stderr = io.MultiWriter(&d.Stderr, detector)
+		}
+		cmd.Cancel = func() error {
+			return cmd.Process.Signal(os.Interrupt) // Use interrupt signal to stop the command when context is cancelled
+		}
+	}, "defang", "compose", "down", "--detach")
+	if err != nil {
+		return nil, fmt.Errorf("failed to run compose down: %w", err)
+	}
+	err = os.Chdir(wkdir)
+	if err != nil {
+		return nil, fmt.Errorf("failed to change working directory: %w", err)
+	}
+
 	d.HasDeployed = true
 	start := time.Now()
 	cmd, err := d.RunCommand(cmdCtx, func(cmd *exec.Cmd) {