WASM: end-to-end-test support (#846)

* Wasm: end-to-end-test support

* Update testing dev docs

* Expose Arc in prelude

* Switch to waterfalls fork

* Set node version

.github/workflows/main.yml

@@ -359,6 +359,11 @@ jobs:
           sudo apt-get update
           sudo apt-get install -y docker-compose
 
+      - name: Set up Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: '22'
+
       - name: Install Wasm target
         run: rustup target add wasm32-unknown-unknown