scaffolder-backend: add build script for bundling nunjucks

Co-authored-by: Johan Haals <johan.haals@gmail.com>
Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

plugins/scaffolder-backend/package.json

@@ -27,7 +27,8 @@
     "test": "backstage-cli test",
     "prepack": "backstage-cli prepack",
     "postpack": "backstage-cli postpack",
-    "clean": "backstage-cli clean"
+    "clean": "backstage-cli clean",
+    "build:assets": "node scripts/build-nunjucks.js"
   },
   "dependencies": {
     "@backstage/backend-common": "^0.9.10",
@@ -79,6 +80,7 @@
     "@types/mock-fs": "^4.13.0",
     "@types/nunjucks": "^3.1.4",
     "@types/supertest": "^2.0.8",
+    "esbuild": "^0.13.14",
     "jest-when": "^3.1.0",
     "mock-fs": "^5.1.0",
     "msw": "^0.35.0",
@@ -88,7 +90,8 @@
   "files": [
     "dist",
     "migrations",
-    "config.d.ts"
+    "config.d.ts",
+    "assets"
   ],
   "configSchema": "config.d.ts"
 }