Revert "Early 0.18 work (#22138)" (#22142)

This reverts commit d24b96d3bb.

docker/main/rootfs/usr/local/nginx/get_base_path.py

@@ -0,0 +1,11 @@
+"""Prints the base path as json to stdout."""
+
+import json
+import os
+from typing import Any
+
+base_path = os.environ.get("FRIGATE_BASE_PATH", "")
+
+result: dict[str, Any] = {"base_path": base_path}
+
+print(json.dumps(result))