fix(test): use Docker bridge gateway for DinD networking

tests/test.sh

@@ -37,11 +37,12 @@ assert_match() {
 }
 
 echo "Running container: $IMAGE"
-docker run -d --name "$CONTAINER_NAME" --network=host "$IMAGE" >/dev/null
+docker run -d --name "$CONTAINER_NAME" -p 8080:8080 "$IMAGE" >/dev/null
 
-BASE_URL="http://localhost:8080"
+DOCKER_GW=$(docker network inspect bridge --format '{{range .IPAM.Config}}{{.Gateway}}{{end}}')
+BASE_URL="http://${DOCKER_GW}:8080"
 
-echo "Waiting for container on localhost:8080..."
+echo "Waiting for container on ${DOCKER_GW}:8080..."
 for i in $(seq 1 30); do
   if curl -sf "$BASE_URL/" >/dev/null 2>&1; then
     echo "Container ready after ${i}s"