Add build pipeline

.gitea/workflows/build.yml

@@ -0,0 +1,34 @@
+name: Build
+on: [push, workflow_dispatch]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    container: ghcr.io/qmk/qmk_cli
+    strategy:
+      fail-fast: false
+      matrix:
+        file:
+          - lily58
+    steps:
+      - name: Disable git safe directory checks
+        run: git config --global --add safe.directory "*"
+      - name: Checkout QMK
+        uses: actions/checkout@v4
+        with:
+          repository: qmk/qmk_firmware
+          submodules: recursive
+      - name: Checkout userspace
+        uses: actions/checkout@v4
+        with:
+          path: users/${{ gitea.actor }}
+      - name: Build firmware
+        run: qmk compile "users/${{ gitea.actor }}/${{ matrix.file }}"
+      - name: Archive firmware
+        uses: actions/upload-artifact@v3
+        continue-on-error: true
+        with:
+          name: ${{ matrix.file }}_${{ github.actor }}
+          path: |
+            *.hex
+            *.bin
+            *.uf2