stop last running action

Signed-off-by: Peter Siegmund <developer@mars3142.org>

.github/workflows/esp32_build.yml

@@ -1,8 +1,15 @@
 name: Thomas the tank engine - Build the ESP-IDF Project
 
 on:
+  push:
   pull_request:
   merge_group:
+  schedule:
+    - cron: "0 5 * * 3"
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
 
 jobs:
   build:

.gitignore

@@ -5,6 +5,7 @@ sdkconfig.old
 
 # They ignored Idea (Webstorm) completely
 .idea/
+.cache/
 
 # However, they kept the following 4 files version controlled
 .vscode/*