fixup! fixup! Ticket #4170: implement CI via GitHub Actions

Signed-off-by: Yury V. Zaytsev <yury@shurup.com>

.github/workflows/ci.yml

@@ -16,3 +16,21 @@ jobs:
 
       - name: Bootstrap build system
         run: ./autogen.sh
+
+      - name: Check formatting
+        run: make indent || true
+
+      - name: Build
+        run: |
+          mkdir -p build-default && cd $_
+
+          ../configure \
+              --prefix="$(pwd)/install" \
+              --enable-mclib \
+              --enable-aspell \
+              --enable-vfs-undelfs \
+              --enable-werror
+
+          make
+          make check
+          make install