add ipv6 and disable UDP, update perms on docker run

root/etc/s6-overlay/s6-rc.d/init-nginx/run

@@ -24,6 +24,9 @@ fi
 cp /defaults/default.conf ${NGINX_CONFIG}
 sed -i "s/3000/$CPORT/g" ${NGINX_CONFIG}
 sed -i "s/3001/$CHPORT/g" ${NGINX_CONFIG}
+if [ ! -z ${DISABLE_IPV6+x} ]; then
+  sed -i '/listen \[::\]/d' ${NGINX_CONFIG}
+fi
 if [ ! -z ${PASSWORD+x} ]; then
   printf "${CUSER}:$(openssl passwd -apr1 ${PASSWORD})\n" > /etc/nginx/.htpasswd
   sed -i 's/#//g' ${NGINX_CONFIG}

root/etc/s6-overlay/s6-rc.d/svc-kasmvnc/run

@@ -11,6 +11,7 @@ fi
 exec s6-setuidgid abc \
   /usr/local/bin/Xvnc $DISPLAY \
     ${HW3D} \
+    -PublicIP 127.0.0.1 \
     -drinode ${DRINODE} \
     -disableBasicAuth \
     -SecurityTypes None \