-openssl x509 -req -days 3650 -in /usr/share/nginx/conf/server.csr \
--signkey /usr/share/nginx/conf/server.key \
--out /usr/share/nginx/conf/server.crt
+openssl x509 -req -days 3650 -in $nginx/conf/server.csr \
+ -signkey $nginx/conf/server.key -out $nginx/conf/server.crt