use devcontainer image for ci

.github/workflows/ci.yml

@@ -13,26 +13,16 @@ env:
 jobs:
   test:
     runs-on: ubuntu-latest-4-cores
+    container:
+      image: ghcr.io/dojoengine/dojo-dev:4979471
     steps:
       - uses: actions/checkout@v3
         with:
           fetch-depth: 0
-      - uses: dtolnay/rust-toolchain@master
-        with:
-          toolchain: ${{ env.RUST_VERSION }}
       - uses: Swatinem/rust-cache@v2
-      - uses: arduino/setup-protoc@v1
-        with:
-          repo-token: ${{ secrets.GITHUB_TOKEN }}
       - name: Install nextest test runner
         uses: taiki-e/install-action@nextest
 
-      - name: Build and run dev container task
-        uses: devcontainers/[email protected]
-        with:
-          runCmd: cargo install nextest && cargo nextest run --all-features
-
-
   ensure-wasm:
     runs-on: ubuntu-latest
     steps: