Add a build job

.gitea/workflows/build.yaml

@@ -0,0 +1,19 @@
+name: Build
+
+on:
+  push:
+    branches:
+      - '**'
+  pull_request:
+    branches: [master]
+
+jobs:
+  build:
+    runs-on: alpine
+    steps:
+      - run: |
+          apk -U upgrade
+          apk add cmake build-base pkgconf glibmm-dev dbus-dev
+      - run: |
+          cmake -B build
+          make -C build