feat: Add cronjob (#6)

Author: limakzi

.github/workflows/main.yaml

@@ -8,6 +8,8 @@ on:
       - 'src/dockerfiles/**'
     branches: 
       - main
+  schedule:
+      - cron: '30 10 * * 1'
   push:
     paths:
       - '.github/**'
@@ -76,7 +78,7 @@ jobs:
           context: ./src/dockerfiles/${{ matrix.image }}
           file: ./src/dockerfiles/${{ matrix.image }}/Dockerfile
           platforms: ${{ matrix.platform }}
-          push: ${{ github.event_name != 'pull_request' }}
+          push: ${{ ! github.event_name == 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=gha