Add GitHub actions workflow to build and test

.github/workflows/build-and-test.yml

@@ -0,0 +1,28 @@
+name: Build and test
+
+on:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  build-and-test:
+    name: Build curl-impersonate and run the tests
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Build the Chrome version of curl-impersonate
+        uses: docker/build-push-action@v2
+        with:
+          push: false
+          context: chrome/
+          tags: curl-impersonate-chrome:latest
+
+      - name: Build the Firefox version of curl-impersonate
+        uses: docker/build-push-action@v2
+        with:
+          push: false
+          context: firefox/
+          tags: curl-impersonate-firefox:latest