ci: build amd64 on opt-in main commits [CI SKIP]

.woodpecker/main-amd64-build.yml

@@ -0,0 +1,25 @@
+labels:
+  ci: domain-linux-native
+  platform: linux/amd64
+
+clone:
+  - name: git
+    image: plugin-git
+    settings:
+      lfs: false
+
+when:
+  - event: push
+    branch: main
+    evaluate: 'CI_COMMIT_MESSAGE contains "[CI]"'
+
+concurrency: 1
+
+steps:
+  - name: build-linux-amd64-images
+    image: bash
+    environment:
+      NUGET_PACKAGES: /home/justme/.nuget/packages
+    commands:
+      - bash ci/build-main-amd64.sh
+    depends_on: []