ci: use docker compose instead of docker-compose (see https://github.com/orgs/community/discussions/116610) (#21992)

.github/workflows/websockets_ci.yml

@@ -43,7 +43,7 @@ jobs:
 
       ## Autobahn integrations tests
       - name: Run autobahn services
-        run: docker-compose -f ${{github.workspace}}/vlib/net/websocket/tests/autobahn/docker-compose.yml up -d
+        run: docker compose -f ${{github.workspace}}/vlib/net/websocket/tests/autobahn/docker-compose.yml up -d
 
       - name: Wait for the service to start
         run: sleep 10s

vlib/net/websocket/tests/autobahn/README.md

@@ -9,7 +9,7 @@ The performance tests are skipped due to timeouts in Github actions.
 
 This is how to test the client:
 
-1. Run the docker autobahn test suite by running the `docker-compose up`
+1. Run the docker autobahn test suite by running the `docker compose up`
 2. From the `local_run` folder, compile and run `autobahn_client.v` to test non wss (no TLS) and 
 `autobahn_client_wss.v` to run the TLS tests
 3. Open `http://localhost:8080` and browse client test results for non TLS and `https://localhost:8081` 

vlib/net/websocket/tests/autobahn/local_run/Dockerfile

@@ -6,7 +6,4 @@ FROM node:12.6-buster-slim
 
 COPY config/fuzzingserver.json /config/fuzzingserver.json
 RUN chmod +775 /config/fuzzingserver.json
-RUN apt update && \
-    apt install -y \
-    docker \
-    docker-compose
+RUN apt update && apt install -y docker