bug(admin,gql): Fix startup behavior in dev mode

Because:
- Nest apis could fail to start because main.js wasn't found
- NX work changed structure of dist folder

This Commit:
- Adjust the path to point to the new location of main.js

packages/fxa-admin-server/nest-cli.json

@@ -2,9 +2,8 @@
   "collection": "@nestjs/schematics",
   "sourceRoot": "src",
   "compilerOptions": {
-    "assets": [
-      "**/*.gql"
-    ],
+    "assets": ["**/*.gql"],
     "watchAssets": true
-  }
+  },
+  "entryFile": "src/packages/admin-server/main.js"
 }

packages/fxa-graphql-api/nest-cli.json

@@ -1,4 +1,5 @@
 {
   "collection": "@nestjs/schematics",
-  "sourceRoot": "src"
+  "sourceRoot": "src",
+  "entryFile": "packages/fxa-graphql-api/src/main.js"
 }