Add support for LOCAL_NETWORK environment variable

entrypoint.sh

@@ -2,6 +2,12 @@
 
 set -e
 
+default_route_ip=$(ip route | grep default | awk '{print $3}')
+if [[ -z "$default_route_ip" ]]; then
+    echo "No default route configured" >&2
+    exit 1
+fi
+
 configs=`find /etc/wireguard -type f -printf "%f\n"`
 if [[ -z "$configs" ]]; then
     echo "No configuration files found in /etc/wireguard" >&2
@@ -31,6 +37,11 @@ else
     ip6tables -I OUTPUT ! -o $interface -m mark ! --mark $(wg show $interface fwmark) -m addrtype ! --dst-type LOCAL $docker6_network_rule -j REJECT
 fi
 
+if [[ "$LOCAL_NETWORK" ]]; then
+    ip route add $LOCAL_NETWORK via $default_route_ip
+    iptables -I OUTPUT -d $LOCAL_NETWORK -j ACCEPT
+fi
+
 shutdown () {
     wg-quick down $interface
     exit 0