ci: build on new pull request to main

.github/workflows/build.yml

@@ -0,0 +1,34 @@
+---
+name: Build
+on:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  golang:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/[email protected]
+      - uses: actions/setup-go@v5
+        with:
+          go-version: '^1.22.2'
+      - run: make promu
+      - run: promu crossbuild -v
+      - name: Store binaries
+        uses: actions/upload-artifact@v4
+        with:
+          name: build
+          path: .build
+
+  docker:
+    needs: golang
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/[email protected]
+      - name: Download binaries artifacts
+        uses: actions/download-artifact@v4
+        with:
+          name: build
+          path: .build
+      - run: make docker