Use the Rust docker image

.forgejo/workflows/ci.yaml

@@ -5,11 +5,11 @@ on: [push]
 jobs:
   build-run:
     runs-on: docker
+    container:
+      image: rust
     steps:
       - name: Checkout repo
         uses: actions/checkout@v4
-      - name: Setup Rust
-        uses: https://github.com/actions-rust-lang/setup-rust-toolchain@v1
       - name: Setup Deno 2
         uses: https://github.com/denoland/setup-deno@v2
         with: