update docs

.github/workflows/ci.yml

@@ -1,5 +1,8 @@
 name: tests
 
+# https://docs.github.com/de/actions/using-workflows/workflow-syntax-for-github-actions
+# https://docs.github.com/en/actions/using-workflows
+
 on:
   push:
   pull_request:

.github/workflows/ci_docker.yml

@@ -1,5 +1,8 @@
 name: docker
 
+# https://docs.github.com/de/actions/using-workflows/workflow-syntax-for-github-actions
+# https://docs.github.com/en/actions/using-workflows
+
 # How to setup: https://event-driven.io/en/how_to_buid_and_push_docker_image_with_github_actions/
 # How to run: https://aschmelyun.com/blog/using-docker-run-inside-of-github-actions/
 
@@ -8,7 +11,10 @@ on:
   push:
   #  branches: [master]
   # run it during pull request
-  # pull_request:
+  pull_request:
+  schedule:
+    # Run weekly
+    - cron: '47 3 * * 6'
 
 jobs:
   # define job to build and publish docker image