Direct mount to /data and dynamic .tmp creation

- Change Docker mount from /data/uploads to /data directly
- Remove pre-creation of .tmp directory in Dockerfile
- Add dynamic creation of .tmp directory during chunked upload
- Hide all dot-prefixed directories in file listing
- Files now appear directly in root directory without uploads folder

main.go

@@ -118,11 +118,11 @@ func listFiles(c *gin.Context) {
 	}
 
 	var files []FileInfo
-	for _, entry := range entries {
+    for _, entry := range entries {
-		name := entry.Name()
+        name := entry.Name()
-		if name == "." || name == ".." || name == "static" {
+        if name == "." || name == ".." || strings.HasPrefix(name, ".") {
-			continue
+            continue
-		}
+        }
 
 		entryPath := filepath.Join(path, name)