Use explicit Docker subnets in API CI

scripts/php-ci-test.sh

@@ -88,6 +88,17 @@ prune_unused_docker_networks() {
   docker network prune -f >/dev/null 2>&1 || true
 }
 
+configure_ci_docker_subnet() {
+  if [ -n "${CI_DOCKER_SUBNET:-}" ]; then
+    return
+  fi
+
+  checksum="$(printf '%s' "$COMPOSE_PROJECT_NAME" | cksum | awk '{print $1}')"
+  subnet_second=$((64 + ((checksum / 256) % 64)))
+  subnet_third=$((checksum % 256))
+  export CI_DOCKER_SUBNET="10.${subnet_second}.${subnet_third}.0/24"
+}
+
 cleanup() {
   status="$?"
   collect_logs "$status"
@@ -107,6 +118,7 @@ cleanup() {
 }
 trap cleanup EXIT INT TERM
 
+configure_ci_docker_subnet
 prune_unused_docker_networks
 retry_command "${PHP_CI_DOCKER_RETRIES:-3}" docker compose $compose_files up -d redis mysql-debug php1