Add postinstall target

package.json

@@ -44,6 +44,7 @@
     "test": "jest --runInBand --verbose",
     "test:auctions": "TEST_AUCTIONS_ENABLED=1 jest --runInBand --verbose src/auction.test.ts",
     "test:nameservice-expiry": "TEST_NAMESERVICE_EXPIRY=1 jest --runInBand --verbose src/nameservice-expiry.test.ts",
-    "build": "tsc"
+    "build": "tsc",
+    "postinstall": "tsc --outDir ./dist"
   }
 }