Implement exporter using nocap from nostr-watch along with tests

package.json

@@ -1,17 +1,27 @@
 {
   "name": "relay-exporter",
   "version": "1.0.0",
-  "description": "",
-  "main": "index.js",
+  "description": "Prometheus exporter for Nostr relay health checks",
+  "type": "module",
+  "main": "dist/index.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "dev": "tsx watch src/index.ts",
+    "build": "tsc -p tsconfig.json",
+    "start": "node dist/index.js",
+    "test": "tsx --test test/config.test.ts test/smoke.test.ts"
   },
-  "keywords": [],
-  "author": "",
-  "license": "ISC",
+  "keywords": [
+    "nostr",
+    "prometheus",
+    "exporter"
+  ],
+  "license": "MIT",
   "packageManager": "pnpm@10.28.0",
   "dependencies": {
     "@nostrwatch/nocap": "^0.9.2",
+    "@nostrwatch/nocap-every-adapter-default": "^1.7.0",
+    "nostr-tools": "^2.23.3",
+    "p-limit": "^7.3.0",
     "prom-client": "^15.1.3"
   },
   "devDependencies": {