Added dev script

package.json

@@ -4,7 +4,7 @@
   "description": "The document generation server for the LfK! runner system. This generates certificates, sponsoring aggreements and more",
   "main": "src/app.ts",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "dev": "nodemon src/app.ts"
   },
   "repository": {
     "type": "git",
@@ -52,4 +52,4 @@
     "ts-node": "^9.1.1",
     "typescript": "^4.1.3"
   }
-}
+}