fix target

expose target as env var

init test workflow

.github/workflows/test.yaml

@@ -0,0 +1,25 @@
+name: Rust
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+env:
+  CARGO_TERM_COLOR: always
+  TARGET: wasm32-unknown-unknown
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Build
+        run: |
+          rustup target add $TARGET
+          cargo build --verbose --target $TARGET
+      - name: Run tests
+        run: cargo test --verbose