added conopy script proxy

README.md

@@ -96,9 +96,12 @@ If direct download is blocked, use a SOCKS5 proxy (`pip install PySocks`):
 python scripts/bootstrap_canopy.py \
   --bbox 27.3,58.4,35.8,61.4 \
   --output-dir data/canopy \
-  --proxy socks5://user:pass@host:port
+  --proxy socks5h://user:pass@host:port
 ```
 
+Use `socks5h://` (DNS via proxy), same as `curl --proxy socks5h://`. Plain `socks5://`
+resolves hostnames locally and may hang if local DNS is blocked.
+
 The same URL can be passed via `CANOPY_PROXY` env var instead of `--proxy`.
 
 The `/api/v1/landcover/path` endpoint samples all `.tif`/`.tiff` files under