Upgrade to docker compose plugin instead of docker-compose.

Author: GollyTicker

Diff for: README.md

@@ -208,6 +208,8 @@ How to make a release: [RELEASE.md](RELEASE.md)
 
 - As for script utilities, one needs `bash`, `jq`, `zip`, `unzip` and `curl`.
 
+Please make sure, that docker including the docker compose plugin is installed. The setup works with docker `v26.1.3` and docker compose `v2.27.0`,
+
 Running the tests will download the protoc binaries on the first invocation automatically.
 
 For development the `generated-local.Dockerfile` (via [generate-local.Dockerfile.sh](dev/generate-local.Dockerfile.sh)) is used.

Diff for: test/servers/compose.yml

@@ -1,5 +1,3 @@
-version: "3.9"
-
 services:
 
   server:

Diff for: test/suite/setup.sh

@@ -59,22 +59,22 @@ export -f buildProtocurl
 
 startServer() {
   echo 'Starting server...' &&
-    docker-compose -f test/servers/compose.yml up --build -d >/dev/null 2>&1 &&
+    docker compose -f test/servers/compose.yml up --build -d >/dev/null 2>&1 &&
     echo 'Done.'
 }
 export -f startServer
 
 stopServer() {
   echo 'Stopping server...' &&
-    docker-compose -f test/servers/compose.yml down >/dev/null 2>&1 &&
+    docker compose -f test/servers/compose.yml down >/dev/null 2>&1 &&
     echo 'Done.'
 }
 export -f stopServer
 
 isServerReady() {
   rm -rf tmpfile.log || true
 
-  docker-compose -f test/servers/compose.yml logs >tmpfile.log
+  docker compose -f test/servers/compose.yml logs >tmpfile.log
 
   if [[ "$?" == 1 ]]; then
     echo "Aborting as server status could not be fetched"