diff --git a/README.md b/README.md
index 0bfff81..5b003a0 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,2 @@
 # bob
-
 preconfigured docker image builder
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diff --git a/build.yaml b/build.yaml
new file mode 100644
index 0000000..4813a56
--- /dev/null
+++ b/build.yaml
@@ -0,0 +1,46 @@
+name: "Bob the Builder"
+description: "automatic preconfigured docker image builder for gitea"
+inputs:
+  registry:
+    description: "container registry link"
+    default: ""
+  username:
+    description: "username for registry authentication"
+    required: false
+  token:
+    description: "token for registry authentication"
+    required: false
+  tag:
+    description: "image tag to push"
+    required: true
+  dockerfile:
+    description: "path to dockerfile"
+    required: false
+    default: "Dockerfile"
+  build-args:
+    description: "passed as build-args to docker build"
+    required: false
+runs:
+  using: "composite"
+  steps:
+    - name: "login to docker"
+      uses: docker/login-action@v3
+      with:
+        registry: ${{ inputs.registry }}
+        username: ${{ inputs.username }}
+        password: ${{ inputs.token }}
+
+    - name: "build image"
+      uses: docker/build-push-action@v6
+      with:
+        push: true
+        tags: ${{ inputs.tag }}
+        file: ${{ inputs.dockerfile }}
+        build-args: ${{ inputs.build-args }}
+        no-cache: true
+
+    - name: "cleanup image"
+      shell: bash
+      run: |
+        docker rmi ${{ inputs.tag }}
+        docker system prune
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