add checkout step to build workflow

and remove demo workflow

.forgejo/workflows/build.yaml

@@ -4,6 +4,8 @@ jobs:
     runs-on: docker
     steps:
       - run: echo "building container..."
+      - name: Checkout code
+        uses: actions/checkout@v4
       - name: Take a look around
         run: |
           echo "Current directory contents:"

.forgejo/workflows/demo.yaml

@@ -1,6 +0,0 @@
-on: [push]
-jobs:
-  test:
-    runs-on: docker
-    steps:
-      - run: echo "I'm forever blowing bubbles, pretty bubbles in the air...."