setup github actions

.github/workflows/ci.yaml

@@ -0,0 +1,71 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+permissions:
+  contents: read
+
+env:
+  earthly_version: ^0.7.19
+
+jobs:
+  go-mod:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Go
+        uses: actions/setup-go@v4
+        with:
+          go-version-file: 'go.mod'
+
+      - run: go mod tidy
+
+      - name: Check go.mod and go.sum
+        run: git diff --exit-code -- go.mod go.sum
+
+  go-generate:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: earthly/actions-setup@v1
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          version: ${{ env.earthly_version }}
+
+      - run: earthly +generate
+
+      - name: Check diff
+        run: git diff --exit-code
+
+  go-build:
+    runs-on: ubuntu-22.04
+    strategy:
+      matrix:
+        go-env:
+          - name: amd64
+            env: GOOS=linux GOARCH=amd64
+          - name: arm64
+            env: GOOS=linux GOARCH=arm64
+          - name: armv7
+            env: GOOS=linux GOARCH=arm GOARM=7
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Go
+        uses: actions/setup-go@v4
+        with:
+          go-version-file: 'go.mod'
+
+      - name: Build
+        run: CGO_ENABLED=0 ${{ matrix.go-env.env }} go build -o out/
+
+      - uses: actions/upload-artifact@v3
+        with:
+          name: ${{ matrix.go-env.name }}
+          path: out/**/*