Delete the non-existing files in the content dir

when rsync transfers content files.

script/build_on_linux.sh

@@ -9,7 +9,9 @@ original_article_home="/home/ld/Documents/ld_article"
 original_article_destination="/opt/ld-site/src/content"
 ld_site_dist_target="/opt/nginx_targets/ld_site_dist"
 
-rsync -a "${original_article_home}/" "${original_article_destination}/"
+rsync -a --delete-after -f"P config.ts" \
+      "${original_article_home}/" \
+      "${original_article_destination}/"
 
 cd "${script_path}/../"
 npm run build