Fix problem where some commands do need to run as root

+ Actually create the UID 1001 user so it has a home directory to
  store files like .gitconfig (and Python configuration files).

.github/workflows/alpine-test.yml

@@ -8,16 +8,17 @@ jobs:
 
     container:
       image: alpine:latest
-      options: --user 1001
 
     defaults:
       run:
-        shell: sh -exo pipefail {0}
+        shell: sudo -u runner sh -exo pipefail {0}
 
     steps:
-    - name: Install Alpine Linux packages
+    - name: Prepare Alpine Linux
       run: |
-        apk add git git-daemon python3 py3-pip
+        apk add sudo git git-daemon python3 py3-pip
+        adduser -D -u 1001 runner
+      shell: sh -exo pipefail {0}  # Run this as root, not the "runner" user.
 
     - uses: actions/checkout@v4
       with: