To run frontend you need to have trunk installed (https://trunkrs.dev/#install). Position in ether-crawler-app\frontend and run:
trunk serve
If you get error[E0463]: can't find crate for core, you should run:
rustup target add wasm32-unknown-unknown
To run backend position in ether-crawler-app\backend and run:
cargo run
To access the app you should go to http://localhost:8080/