Added license exporter (to json)

ref #59

package.json

@@ -59,6 +59,7 @@
     "cp-cli": "^2.0.0",
     "jest": "^26.6.3",
     "nodemon": "^2.0.6",
+    "license-checker": "^25.0.1",
     "rimraf": "^2.7.1",
     "start-server-and-test": "^1.11.6",
     "ts-jest": "^26.4.4",
@@ -74,7 +75,8 @@
     "test:watch": "jest --watchAll",
     "test:ci": "start-server-and-test dev http://localhost:4010/api/docs/openapi.json test",
     "seed": "ts-node ./node_modules/typeorm/cli.js schema:sync && ts-node ./node_modules/typeorm-seeding/dist/cli.js seed",
-    "openapi:export": "ts-node src/openapi_export.ts"
+    "openapi:export": "ts-node src/openapi_export.ts",
+    "licenses:export": "node license_exporter.js"
   },
   "nodemonConfig": {
     "ignore": [