Update gasprice.service (#2)

- added start with an unprivileged user. commented by default
- added env variables for utf8 support 
- added graceful shutdown

gasprice.service

@@ -3,8 +3,24 @@ Description=gasprice
 After=network.target
 
 [Service]
+
+; Solves Python3.6 errors on clean Ubuntu 16.04 LTS  
+Environment=LC_ALL=C.UTF-8
+Environment=LANG=C.UTF-8
+
 ExecStart=/usr/local/bin/gasprice
 Restart=on-failure
 
+; Run under unprivileged mode instead of root
+; Uncomment to apply
+; User=www-data
+; Group=www-data
+
+; Use graceful shutdown with a reasonable timeout
+
+KillMode=mixed
+KillSignal=SIGQUIT
+TimeoutStopSec=5s
+
 [Install]
 WantedBy=multi-user.target