Make the path to create_toc.lua os-agnostic

cmd/backend/docx.go

@@ -21,7 +21,7 @@ func ConvertToMarkdown(c *Config, filename string) ([]byte, error) {
 	defer os.RemoveAll(tmpDir)
 
 	articleFileName := filepath.Join(os.TempDir(), fmt.Sprint(uuid.New(), ".md"))
-	cmd := exec.Command("pandoc", "-s", "--lua-filter=cmd/backend/create_toc.lua", "-f", "docx", "-t", "commonmark_x", "-o", articleFileName, "--extract-media", tmpDir, filename) // TODO: Is writing to a file necessary?
+	cmd := exec.Command("pandoc", "-s", "-L", filepath.Join("scripts", "create_toc.lua"), "-f", "docx", "-t", "commonmark_x", "-o", articleFileName, "--extract-media", tmpDir, filename) // TODO: Is writing to a file necessary?
 	cmd.Stderr = &stderr
 	if err = cmd.Run(); err != nil {
 		return nil, fmt.Errorf("error converting docx to markdown: %v: %v", err, stderr.String())