diff --git a/.gitea/workflows/checks.yml b/.gitea/workflows/checks.yml
index 176c323..f76c69f 100644
--- a/.gitea/workflows/checks.yml
+++ b/.gitea/workflows/checks.yml
@@ -7,17 +7,12 @@ jobs:
   lint:
     runs_on: "alpine_amd64"
     container:
-      image: "rust:1.73-alpine3.18"
+      # TODO use communitymedia docker registry
+      image: "cascode/aural-isle-ci:0"
     name: format
     steps:
-      - name: TODO put in image base
-        run: apk add nodejs git
       - uses: actions/checkout@v3
         with:
           github-server-url: "https://code.communitymedia.network"
-      - name: TODO put in image base
-        run: rustup component add rustfmt
-      - name: ls
-        run: "ls -al && pwd"
       - name: rustfmt
         run: cargo fmt --check
diff --git a/ci/Dockerfile b/ci/Dockerfile
new file mode 100644
index 0000000..ec93337
--- /dev/null
+++ b/ci/Dockerfile
@@ -0,0 +1,7 @@
+FROM rust:1.73-alpine3.18
+
+#install build tooling
+RUN rustup component add rustfmt
+
+# install gitea act_runner dependencies
+RUN apk add nodejs git