fix: correctly set default routes

wireguard/Dockerfile

@@ -9,7 +9,7 @@ RUN rm /sbin/iptables /sbin/ip6tables
 RUN ln -s /sbin/ip6tables-nft /sbin/ip6tables
 RUN ln -s /sbin/iptables-nft /sbin/iptables
 
-ENV LOCAL_NETWORK=""
+ENV LOCAL_NETWORKS=""
 
 COPY entrypoint.sh /entrypoint.sh
 ENTRYPOINT ["/entrypoint.sh"]

wireguard/entrypoint.sh

 #!/bin/sh
 set -eu
 
-if [ -n "$LOCAL_NETWORK" ]; then
+if [ -n "$LOCAL_NETWORKS" ]; then
   gateway=$(ip route list match 0.0.0.0 | grep -v tun0 | cut -d ' ' -f 3)
   interface=$(ip route list match 0.0.0.0 | grep -v tun0 | cut -d ' ' -f 5)
   echo gateway="$gateway"
@@ -14,6 +14,8 @@ chmod 0666 /dev/net/tun
 
 wg-quick up /wireguard.conf
 
-if [ -n "$LOCAL_NETWORK" ]; then
-  ip r add "$LOCAL_NETWORK" via "${gateway}" dev "${interface}"
+if [ -n "$LOCAL_NETWORKS" ]; then
+  for LOCAL_NETWORK in $LOCAL_NETWORKS; do
+    ip route add "$LOCAL_NETWORK" via "${gateway}" dev "${interface}"
+  done
 fi