OSM Tile-Cache Nginx Config

sites-available-tilecache.conf

#
# Nginx >= 1.9.15 - 1.10.1 recommended
#
proxy_cache_path /var/www/tilecache/osm
  levels=1:2 inactive=7d
  keys_zone=tilecache:64m
  max_size=500M;
	
upstream osm_tiles {
	server a.tile.openstreetmap.org;
	server b.tile.openstreetmap.org;
	server c.tile.openstreetmap.org;
	keepalive 16;
}

server {
	listen 80;
	listen [::]:80;
	server_name tiles.COMMUNITY.freifunk.net
		~^tiles\d+\.COMMUNITY\.freifunk\.net$;
		
	return 301 https://$server_name$request_uri;
}

server {
	listen 443 ssl http2;
	listen [::]:443 ssl http2;
	server_name tiles.COMMUNITY.freifunk.net
		~^tiles\d+\.COMMUNITY\.freifunk\.net$;
	
	add_header Strict-Transport-Security "max-age=15768000" always;
	ssl_certificate	/path/to/WILDCARD.pem;
	ssl_certificate_key	/path/to/WILDCARD.key;
	
	access_log	/var/www/tilecache/logs/access.log;
	error_log		/var/www/tilecache/logs/error.log;
	
	root /var/www/tilecache/html;
	
	location / {
		try_files $uri @osm;
	}
	
	location @osm {
		proxy_pass http://osm_tiles;
		proxy_http_version	1.1;
		proxy_set_header    Connection "";
		proxy_set_header    Accept-Encoding "";
		proxy_set_header    User-Agent "Mozilla/5.0 (compatible; OSMTileCache/1.0; +mailto:contact@site.freifunk.net; +https://map.COMMUNITY.freifunk.net/)";
		proxy_set_header    Host tile.openstreetmap.org;
		
		proxy_temp_path     /var/www/tilecache/temp;
		proxy_cache         tilecache;
		proxy_store         off;
		proxy_cache_key     $uri$is_args$args;
		proxy_ignore_headers Expires Cache-Control;
		proxy_cache_valid   200 301 302 7d;
		proxy_cache_valid   404 1m;
		proxy_cache_valid   any 1m;
		proxy_next_upstream   error timeout invalid_header http_500 http_502 http_503 http_504 http_403 http_404;
		proxy_cache_use_stale error timeout updating invalid_header http_500 http_502 http_503 http_504 http_403 http_404;
		
		proxy_hide_header   Via;
		proxy_hide_header   X-Cache;
		proxy_hide_header   X-Cache-Lookup;
		
		expires 7d;
	}
}