add github workflow

.github/workflows/main.yml

@@ -0,0 +1,24 @@
+name: build
+on: push
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    name: Build Smiley Sans
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: '3.10'
+      - name: Install dependencies
+        run: |
+          python -m pip install -U pip
+          pip install -r requirements.txt
+      - name: Build fonts
+        run: source build.sh
+      - uses: actions/upload-artifact@v3
+        with:
+          name: smiley-sans
+          path: |
+            build/*.otf
+            build/*.ttf
+            build/*.woff2

requirements.txt

@@ -0,0 +1,3 @@
+brotli
+fontmake
+fonttools