ADDED: ci for docker build and push to docker hub

Author: AleixMT

.github/workflows/ci.yml

@@ -0,0 +1,40 @@
+name: ci
+
+# Trigger event on every push / delete event, no matter the branch
+# on: [push, delete]
+
+# Trigger event on every push / delete event, only in master branch
+on:
+  push:
+    branches:
+      - "master"
+  delete:
+    branches:
+      - "master"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v3
+      -
+        name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      -
+        name: Build and push
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          file: ./Dockerfile
+          push: true
+          tags: ${{ secrets.DOCKERHUB_USERNAME }}/github-backup:latest
+
+