Install docker

.forgejo/workflows/ci.yaml

@@ -3,7 +3,7 @@ name: ci-workflow
 on:
   push:
     branches:
-      - main
+      - master
   workflow_dispatch: {}
 
 jobs:
@@ -31,6 +31,11 @@ jobs:
         env:
           HELLO_SECRET: ${{ secrets.HELLO_SECRET }}
 
+      - name: Install docker CLI
+        run: |
+          apt-get update
+          apt-get install -y docker.io
+
       - name: Build image
         run: |
           IMAGE_REF="${REGISTRY_HOST}/${IMAGE_NAMESPACE}/${IMAGE_NAME}:${GITHUB_SHA}"