Enable gzip compression on openwifimap.net

[sarumpaet]

E.g., the view_nodes_spatial call for Berlin is currently 1.4MBytes - with gzip it would be 190KBytes. Downloading all node data (as happens on the Berlin statistics page due to missing precomputation) is ~8MBytes instead of 700KBytes.

[Hannia0322]

Supercable_6660_1733744530460.txt