added method to upload filesystem images

src/database.rs

@@ -227,13 +227,11 @@ mod tests {
         let db = Database::init_from_pool(pool);
         let device_id = MacAddress::from([0x1A, 0x2B, 0x3C, 0x4D, 0x5E, 0x6F]);
 
-        db.add_device(&device_id)
-            .await
-            .unwrap();
-        let msg = ValueMessageFromDevice{
+        db.add_device(&device_id).await.unwrap();
+        let msg = ValueMessageFromDevice {
             active_errors: 0,
             value: 112.0,
-            value_id: 1
+            value_id: 1,
         };
         db.add_value(&msg, &device_id).await.unwrap();
 
@@ -242,6 +240,4 @@ mod tests {
         assert!((values[0].value - msg.value).abs() < 1e-5);
         assert_eq!(values[0].value_id, msg.value_id);
     }
-
-
 }