It's a known issue that IPC call in Tauri V1 is slow
(https://github.com/tauri-apps/tauri/issues/4197) Specifically,
writeBinaryFile can take several seconds if the file is around like 10
MB because of some internal serealization bottleneck of Tauri. This is
really bad as we use writebinaryFile every second to save database.
This PR just create separate http server only handling the bottleneck
part: writebinaryfile of database.bin and assets.
44677cf2cd