Added docker cache and ARM platform

.github/workflows/docker-image.yml

@@ -19,6 +19,13 @@ jobs:
           repository: tdlib/telegram-bot-api
           path: telegram-bot-api
           submodules: recursive
+      - name: Cache Docker layers
+        uses: actions/cache@v2
+        with:
+          path: /tmp/.buildx-cache
+          key: ${{ runner.os }}-buildx-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-buildx-
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v1
       - name: Set up Docker Buildx
@@ -44,8 +51,10 @@ jobs:
         with:
           context: .
           file: ./Dockerfile
-          platforms: linux/386,linux/amd64
+          platforms: linux/386,linux/amd64,linux/arm/v7,linux/arm64
           push: true
+          cache-from: type=local,src=/tmp/.buildx-cache
+          cache-to: type=local,dest=/tmp/.buildx-cache
           tags: |
             aiogram/telegram-bot-api:latest
             aiogram/telegram-bot-api:${{ env.TG_SERVER_VERSION }}