added docker deployment and added a preview to the files.

src/main/java/com/filejet/API/Server.java

@@ -15,6 +15,10 @@ public class Server {
         app.get("/api/download", DownloadRoute::handle); // for ?path=... downloads
         app.get("/api/download/{file}", DownloadRoute::handle); // legacy/compat
         app.get("/api/list-isos", DownloadRoute::list);
+        app.get("/api/view", DownloadRoute::view); // for file preview
+
+        // New endpoint for directory version/hash
+        app.get("/api/dir-version", DownloadRoute::dirVersion);
 
         app.before("/api/*", ctx -> {
             String ua = ctx.header("User-Agent");