Fix small issue with nginx repository.

install/hst-install-debian.sh

@@ -486,7 +486,7 @@ check_result $? 'apt-get upgrade failed'
 apt=/etc/apt/sources.list.d
 
 # Installing nginx repo
-echo "deb http://nginx.org/packages/mainline/ubuntu/ $codename nginx" \
+echo "deb http://nginx.org/packages/mainline/$VERSION/ $codename nginx" \
     > $apt/nginx.list
 wget --quiet http://nginx.org/keys/nginx_signing.key -O /tmp/nginx_signing.key
 apt-key add /tmp/nginx_signing.key > /dev/null 2>&1

install/hst-install-ubuntu.sh

@@ -470,7 +470,7 @@ check_result $? 'apt-get upgrade failed'
 apt=/etc/apt/sources.list.d
 
 # Installing nginx repo
-echo "deb http://nginx.org/packages/mainline/ubuntu/ $codename nginx" \
+echo "deb http://nginx.org/packages/mainline/$VERSION/ $codename nginx" \
     > $apt/nginx.list
 wget --quiet http://nginx.org/keys/nginx_signing.key -O /tmp/nginx_signing.key
 apt-key add /tmp/nginx_signing.key > /dev/null 2>&1