Update docker.yml

Author: e3ndr

.github/workflows/docker.yml

@@ -33,7 +33,5 @@ jobs:
           username: ${{github.actor}}
           password: ${{secrets.GITHUB_TOKEN}}
 
-      - name: Build Inventory Image
-        run: |
-          docker buildx build --platform=linux/amd64,linux/arm64/v8,linux/ppc64le,linux/s390x . --tag ghcr.io/casterlabs/tcp-proxy:latest
-          docker push ghcr.io/casterlabs/tcp-proxy:latest
+      - name: Build & Push image
+        run: docker buildx build --platform=linux/amd64,linux/arm64/v8,linux/ppc64le,linux/s390x --tag ghcr.io/casterlabs/tcp-proxy:latest --push .