Add GitHub actions

Author: https://github.com/Sn0wfaller

.github/workflows/docker-image.yml

@@ -0,0 +1,25 @@
+name: Build and Push lunar-tear to Docker Hub
+
+on:
+  push:
+    branches: [ "main" ]
+    
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          tags: kretts/lunar-tear:latest