Try building an epup

.forgejo/workflows/build.yaml

@@ -4,14 +4,14 @@ on:
       - 'main'
 
 jobs:
-  setup:
+  #setup:
-    runs-on: docker
+  #  runs-on: docker
-    steps:
+  #  steps:
-      - uses: actions/checkout@v4
+  #    - uses: actions/checkout@v4
-      - name: Setup
+  #    - name: Setup
-        run: |
+  #      run: |
-          echo $PWD
+  #        echo $PWD
-          ls -l
+  #        ls -l
   build:
     runs-on: docker
     container:
@@ -19,5 +19,17 @@ jobs:
     steps:
       - name: Setup
         run: |
-          echo $PWD
+          apk add --no-cache git
-          ls -l
+      - name: Clone Repo
+        run: |
+          git clone "$CI_REPOSITORY_URL" .
+          git checkout 
+      - name: Build
+        run: |
+          asciidoctor-epub3 -D output book.adoc
+      - name: Upload
+        uses: actions/upload-artifact@v3
+        with:
+          name: book
+          path: output/
+