make Docker build CI push to Docker Hub as well

Author: br0kenpixel

.github/workflows/docker_build.yml

@@ -21,10 +21,18 @@ jobs:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
+      
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       - name: Build and push the Docker image
         uses: docker/build-push-action@v6
         with:
           context: .
           push: true
-          tags: ghcr.io/pixelweatherproject/pwmp-server:latest
+          tags: |
+            ghcr.io/pixelweatherproject/pwmp-server:latest
+            br0kenpixel/pwmp-server:latest