[WIP] build riscv binaries for vnd-test in CI

.github/workflows/ci.yaml

@@ -1,4 +1,4 @@
-name: Run unit tests
+name: Build and run tests
 
 on:
   push:
@@ -120,3 +120,28 @@ jobs:
     with:
       upload_app_binaries_artifact: "compiled_app_binaries"
       builder: ledger-app-builder
+
+# build test V-App
+  build_vapp_test:
+    name: Build vnd-test on Risc-V target
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Rust toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: nightly
+          target: riscv32i-unknown-none-elf
+          components: rustfmt, clippy
+          profile: minimal
+      - name: Clone
+        uses: actions/checkout@v4
+      - name: Build app
+        working-directory: apps/test/app
+        run: |
+          cargo +nightly build --release --target riscv32i-unknown-none-elf
+      - name: Upload binaries
+        uses: actions/upload-artifact@v4
+        with:
+          name: vnd_test_riscv
+          path: apps/test/app/target/riscv32i-unknown-none-elf/release/vnd-test
+