WASI: add a note for rust wasm target setup
cf
@@ -72,7 +72,7 @@ You can build the WebAssembly WASI file with:
cargo build --release --target wasm32-wasi --features="freeze-stdlib"
```
-> Note: we use the `freeze-stdlib` to include the standard library inside the binary.
+> Note: we use the `freeze-stdlib` to include the standard library inside the binary. You also have to run once `rustup target add wasm32-wasi`.
### JIT(Just in time) compiler
