Move pino-pretty to dev-dep, dev script

backend/package-lock.json

@@ -53,7 +53,6 @@
         "passport-google-oauth20": "^2.0.0",
         "pino": "^8.16.1",
         "pino-http": "^8.5.1",
-        "pino-pretty": "^10.2.3",
         "posthog-node": "^2.6.0",
         "probot": "^12.3.1",
         "query-string": "^7.1.3",
@@ -96,6 +95,7 @@
         "jest-junit": "^15.0.0",
         "nodemon": "^2.0.19",
         "npm": "^8.19.3",
+        "pino-pretty": "^10.2.3",
         "smee-client": "^1.2.3",
         "supertest": "^6.3.3",
         "swagger-autogen": "^2.23.5",