add readme and GitHub action files

.github/workflows/autocommit.yaml

@@ -0,0 +1,28 @@
+name: Keep Repository Active
+
+on:
+  schedule:
+    - cron: '0 0 */28 * *'
+
+jobs:
+  create-empty-commit:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: write
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+      with:
+        ref: main
+
+    - name: Configure Git
+      run: |
+        git config user.name 'Automatic action'
+        git config user.email 'noreply@koyeb.com'
+
+    - name: Create an empty commit and push
+      run: |
+        git commit --allow-empty -m "Automated empty commit to keep repo active" -m "This commit is generated automatically every few weeks to prevent GitHub Actions from being disabled due to inactivity."
+        git push origin main

.github/workflows/cleanup.yaml

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+name: Cleanup Koyeb application
+
+on:
+  delete:
+    branches:
+      - '*'
+
+jobs:
+  cleanup:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install and configure the Koyeb CLI
+        uses: koyeb-community/install-koyeb-cli@v2
+        with:
+          api_token: "${{ secrets.KOYEB_EXAMPLES_APPS_TOKEN }}"
+
+      - name: Cleanup Koyeb application
+        uses: koyeb/action-git-deploy/cleanup@v1
+        with:
+          app-name: spring-boot-${{ github.event.ref }}

.github/workflows/deploy.yaml

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+name: Build and deploy the application to Koyeb
+
+on:
+  schedule:
+    - cron: '55 8 * * *'
+  push:
+    branches:
+      - '*'
+
+jobs:
+  deploy:
+    concurrency:
+      group: "${{ github.ref_name }}"
+      cancel-in-progress: true
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install and configure the Koyeb CLI
+        uses: koyeb-community/install-koyeb-cli@v2
+        with:
+          api_token: "${{ secrets.KOYEB_EXAMPLES_APPS_TOKEN }}"
+
+      - name: Build and deploy the application
+        uses: koyeb/action-git-deploy@v1
+        with:
+          app-name: spring-boot-${{ github.ref_name }}
+          service-ports: "8000:http"
+          service-routes: "/:8000"
+          skip-cache: true