add github workflows

.github/workflows/build.yml

@@ -0,0 +1,42 @@
+name: build
+
+#event trigger : main 브랜치에 push 이벤트 발생시 jobs가 실행된다.
+on:
+  push:
+    branches: [ "main" ]
+
+#권한 설정
+permissions:
+  contents: read
+
+#jobs 정의
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Login to Docker hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          push: true
+          tags: |
+            dalbodeule/chzzkbot:latest
+            dalbodeule/chzzkbot:$(git rev-parse --short HEAD)
+          platforms: |
+            linux/amd64
+            linux/arm64
+            linux/arm/v7