needs to be in config

Author: mnot

.gitignore

@@ -1,3 +1,3 @@
 node_modules
 package-lock.json
-server.PID
+server.pid

package.json

@@ -1,6 +1,6 @@
 {
   "name": "http-cache-tests",
-  "version": "0.4.3",
+  "version": "0.4.4",
   "description": "Tests for HTTP caches",
   "homepage": "https://cache-tests.fyi/",
   "author": "Mark Nottingham",
@@ -14,7 +14,7 @@
     "npm": "^6.14.11"
   },
   "scripts": {
-    "server": "node server/server.mjs  & echo $! > $npm_package_pidfile",
+    "server": "node server/server.mjs  & echo $! > $npm_package_config_pidfile",
     "cli": "node --no-warnings cli.mjs",
     "export": "node --no-warnings export.mjs",
     "validate": "node --no-warnings export.mjs validate",