Update dependency dotenv to v17

Author: renovate[bot]

backend/package.json

@@ -23,7 +23,7 @@
     "winston": "^3.11.0",
     "yaml": "^2.3.4",
     "joi": "^17.11.0",
-    "dotenv": "^16.3.1",
+    "dotenv": "^17.0.0",
     "cookie-parser": "^1.4.6",
     "chokidar": "^5.0.0"
   },