Update release workflow and remove unnecessary scripts

1. Updated the release workflow for GitHub action.
2. Removed the script that updates the lh.ossrs.net and d.ossrs.net.
3. Only kept a demo script for updating r.ossrs.net.

Please note that this code has not been tested yet, but it is expected to work. The changes will be triggered in the next release.

.github/workflows/release.yml

@@ -326,17 +326,15 @@ jobs:
         uses: actions/checkout@v3
       ##################################################################################################################
       # Generate variables like:
-      #   SRS_LH_OSSRS_NET=1.2.3.4
-      - name: Build variables for lh.ossrs.net
+      #   SRS_R_OSSRS_NET=1.2.3.4
+      - name: Build variables for r.ossrs.net
         run: |
-          SRS_LH_OSSRS_NET=$(dig +short lh.ossrs.net)
-          SRS_D_OSSRS_NET=$(dig +short d.ossrs.net)
-          echo "SRS_LH_OSSRS_NET=$SRS_LH_OSSRS_NET" >> $GITHUB_ENV
-          echo "SRS_D_OSSRS_NET=$SRS_D_OSSRS_NET" >> $GITHUB_ENV
-      - name: Release to lh.ossrs.net
+          SRS_R_OSSRS_NET=$(dig +short r.ossrs.net)
+          echo "SRS_R_OSSRS_NET=$SRS_R_OSSRS_NET" >> $GITHUB_ENV
+      - name: Release to r.ossrs.net
         uses: appleboy/ssh-action@master
         with:
-          host: ${{ env.SRS_LH_OSSRS_NET }}
+          host: ${{ env.SRS_R_OSSRS_NET }}
           username: root
           key: ${{ secrets.DIGITALOCEAN_SSHKEY }}
           port: 22
@@ -344,33 +342,7 @@ jobs:
           timeout: 60s
           command_timeout: 30m
           script: |
-            docker pull registry.cn-hangzhou.aliyuncs.com/ossrs/srs:$SRS_MAJOR
-            docker rm -f srs-dev
-            #
-            # Cleanup old docker images.
-            for image in $(docker images |grep '<none>' |awk '{print $3}'); do
-              docker rmi -f $image
-              echo "Remove image $image, r0=$?"
-            done
-      - name: Release to d.ossrs.net
-        uses: appleboy/ssh-action@master
-        with:
-          host: ${{ env.SRS_D_OSSRS_NET }}
-          username: root
-          key: ${{ secrets.DIGITALOCEAN_SSHKEY }}
-          port: 22
-          envs: SRS_MAJOR
-          timeout: 60s
-          command_timeout: 30m
-          script: |
-            docker pull ossrs/srs:$SRS_MAJOR
-            docker rm -f srs-dev
-            #
-            # Cleanup old docker images.
-            for image in $(docker images |grep '<none>' |awk '{print $3}'); do
-              docker rmi -f $image
-              echo "Remove image $image, r0=$?"
-            done
+            echo "Update r.ossrs.net ok for SRS $SRS_MAJOR"
     runs-on: ubuntu-20.04
 
   release: