fix: explicitly need to pull docker images, fixes #1525 (#1526)

The output is a bit messy but it at least will show progress, rather
than hiding the output.

cmd/ftl/cmd_schema_import.go

@@ -151,6 +151,11 @@ func (s *schemaImportCmd) setup(ctx context.Context) error {
 		}
 		_ = l.Close()
 
+		err = container.Pull(ctx, "ollama/ollama")
+		if err != nil {
+			return err
+		}
+
 		err = container.Run(ctx, "ollama/ollama", ollamaContainerName, s.OllamaPort, 11434, optional.Some(ollamaVolume))
 		if err != nil {
 			return err

internal/container/container.go

@@ -40,6 +40,28 @@ func DoesExist(ctx context.Context, name string) (bool, error) {
 	return len(containers) > 0, nil
 }
 
+// Pull pulls the given image.
+func Pull(ctx context.Context, image string) error {
+	cli, err := dockerClient.Get(ctx)
+	if err != nil {
+		return err
+	}
+
+	reader, err := cli.ImagePull(ctx, image, types.ImagePullOptions{})
+	if err != nil {
+		return fmt.Errorf("failed to pull %s image: %w", image, err)
+	}
+	defer reader.Close()
+
+	logger := log.FromContext(ctx)
+	_, err = io.Copy(logger.WriterAt(log.Info), reader)
+	if err != nil {
+		return fmt.Errorf("failed to stream pull: %w", err)
+	}
+
+	return nil
+}
+
 // Run starts a new detached container with the given image, name, port map, and (optional) volume mount.
 func Run(ctx context.Context, image, name string, hostPort, containerPort int, volume optional.Option[string]) error {
 	cli, err := dockerClient.Get(ctx)
@@ -88,6 +110,20 @@ func RunDB(ctx context.Context, name string, port int) error {
 		return err
 	}
 
+	const containerName = "postgres"
+
+	exists, err := DoesExist(ctx, containerName)
+	if err != nil {
+		return err
+	}
+
+	if !exists {
+		err = Pull(ctx, "postgres:latest")
+		if err != nil {
+			return err
+		}
+	}
+
 	config := container.Config{
 		Image: "postgres:latest",
 		Env:   []string{"POSTGRES_PASSWORD=secret"},