add cicd Github action

.github/workflows/cicd.yml

@@ -0,0 +1,30 @@
+name: CI/CD Pipeline
+
+on:
+  push:
+    branches:
+      - master  # Change to your main branch name
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Set env
+        run: echo "RELEASE_VERSION=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      -
+        name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      -
+        name: Build and push flask_blog
+        uses: docker/build-push-action@v5
+        with:
+          file: /flask_blog
+          push: true
+          tags: ${{ env.RELEASE_VERSION }}