ci: Add building docker image pipeline

Author: jus1d

.github/workflows/dockerhub.yaml

@@ -0,0 +1,25 @@
+name: Push image to DockerHub
+
+on:
+  push:
+    branches:
+      - master
+      - dev
+
+jobs:
+  build-image:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        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 image
+        run: |
+          ./build.sh image push