ci: add weekly schedule; push on schedule; avoid duplicate no-push build on schedule

Author: dvershinin

.github/workflows/main.yml

@@ -9,6 +9,8 @@ on:
       - '**/README.md'
     tags:
       - '*'
+  schedule:
+    - cron: '0 3 * * 1'
   workflow_dispatch:
     inputs:
       push:
@@ -70,20 +72,20 @@ jobs:
           curl -fL "https://raw.githubusercontent.com/b4b4r07/httpstat/master/httpstat.sh" -o _dl/httpstat.sh
 
       - name: Login to Docker Hub
-        if: inputs.push == true || github.event_name == 'push'
+        if: inputs.push == true || github.event_name == 'push' || github.event_name == 'schedule'
         uses: docker/login-action@v2
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       - name: Set up QEMU
-        if: inputs.push == true || github.event_name == 'push'
+        if: inputs.push == true || github.event_name == 'push' || github.event_name == 'schedule'
         uses: docker/setup-qemu-action@v3
         with:
           platforms: linux/amd64
 
       - name: Set up Docker Buildx
-        if: inputs.push == true || github.event_name == 'push'
+        if: inputs.push == true || github.event_name == 'push' || github.event_name == 'schedule'
         uses: docker/setup-buildx-action@v2
 
       - name: Build (no push) via docker build (act)
@@ -93,7 +95,7 @@ jobs:
             -t curl-edge:${IMAGE_TAG} -t curl-edge:latest .
 
       - name: Build (no push)
-        if: inputs.push != true && github.event_name != 'push' && env.ACT != 'true'
+        if: inputs.push != true && github.event_name != 'push' && github.event_name != 'schedule' && env.ACT != 'true'
         uses: docker/build-push-action@v4
         with:
           context: .
@@ -123,7 +125,7 @@ jobs:
             /opt/httpstat.sh -I --http3 https://cloudflare-quic.com/ || true
 
       - name: Build and push
-        if: inputs.push == true || github.event_name == 'push'
+        if: inputs.push == true || github.event_name == 'push' || github.event_name == 'schedule'
         uses: docker/build-push-action@v4
         with:
           context: .