Merge pull request #9522 from id/docs-update-docker-readme

docs: update docker readme

.github/workflows/build_and_push_docker_images.yaml

@@ -180,6 +180,15 @@ jobs:
         file: source/${{ matrix.os[2] }}
         context: source
 
+    - name: Docker Hub Description
+      if: matrix.registry == 'docker.io'
+      uses: peter-evans/dockerhub-description@v3
+      with:
+        username: ${{ secrets.DOCKERHUB_USERNAME }}
+        password: ${{ secrets.DOCKERHUB_PASSWORD }}
+        repository: "emqx/${{ needs.prepare.outputs.BUILD_PROFILE }}"
+        readme-filepath: ./source/deploy/docker/README.md
+
   docker-elixir:
     runs-on: ${{ matrix.arch[1] }}
     needs: prepare

deploy/docker/README.md

@@ -20,9 +20,13 @@
 
 ## What is EMQX
 
-[EMQX  MQTT broker](https://emqx.io/products/broker) is a fully open source, highly scalable, highly available distributed MQTT messaging broker for IoT, M2M and Mobile applications that can handle tens of millions of concurrent clients.
+[EMQX](https://emqx.io/) is the world's most scalable open-source MQTT broker with a high performance that connects 100M+ IoT devices in 1 cluster, while maintaining 1M message per second throughput and sub-millisecond latency.
 
-Starting from 3.0 release, *EMQX* broker fully supports MQTT V5.0 protocol specifications and backward compatible with MQTT V3.1 and V3.1.1, as well as other communication protocols such as MQTT-SN, CoAP, LwM2M, WebSocket and STOMP. The 3.0 release of the *EMQX* broker can scaled to 10+ million concurrent MQTT connections on one cluster.
+EMQX supports multiple open standard protocols like MQTT, HTTP, QUIC, and WebSocket. It's 100% compliant with MQTT 5.0 and 3.x standard, and secures bi-directional communication with MQTT over TLS/SSL and various authentication mechanisms.
+
+With the built-in powerful SQL-based rules engine, EMQX can extract, filter, enrich and transform IoT data in real-time. In addition, it ensures high availability and horizontal scalability with a masterless distributed architecture, and provides ops-friendly user experience and great observability.
+
+EMQX boasts more than 20K+ enterprise users across 50+ countries and regions, connecting 100M+ IoT devices worldwide, and is trusted by over 400 customers in mission-critical scenarios of IoT, IIoT, connected vehicles, and more, including over 70 Fortune 500 companies like HPE, VMware, Verifone, SAIC Volkswagen, and Ericsson.
 
 ## How to use this image