automatically build and push docker image to docker hub

.github/workflows/docker-image.yml

@@ -0,0 +1,26 @@
+name: Build Docker Image
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build Docker image
+        run: docker build -t athlon1600/notepad:latest .
+
+      - name: Push Docker image
+        run: docker push athlon1600/notepad:latest