add default config file

config.env

@@ -0,0 +1,19 @@
+# server listening to
+#SPEEDTEST_ADDRESS=127.0.0.1
+#SPEEDTEST_PORT=8000
+
+# certificats and public key
+# those to option are mandatory if you want tu active TLS support
+#SPEEDTEST_CERT=/path/to/public.crt
+#SPEEDTEST_KEY=/path/to/private.key
+# optional CA to validate client
+#SPEEDTEST_CA_CERT=/path/to/ca.crt
+
+# Directory with HTML/js files
+#SPEEDTEST_DIR=/usr/lib/speedtest-rs
+
+# https://ipinfo.io/ token to use this service
+#IPINFO_TOKEN=
+# to get distance between client and server we need to know the server coordonate
+#SPEEDTEST_LATITUDE=0.0
+#SPEEDTEST_LONGITUDE=0.0