Pin wireguard version as latest is currently buggy

coreos-config/compose/02_wireguard/docker-compose.yaml

@@ -1,8 +1,9 @@
 ---
 version: '3.9'
+
 services:
   wireguard:
-    image: linuxserver/wireguard:latest
+    image: linuxserver/wireguard:v1.0.20210914-ls81
     container_name: wireguard
     cap_add:
       - NET_ADMIN
@@ -22,4 +23,15 @@ services:
       - net.ipv4.conf.all.src_valid_mark=1
       - net.ipv6.conf.all.disable_ipv6=0
     restart: unless-stopped
+    networks:
+      - default
+      - gateway
+      - internal_services
+
+networks:
+  gateway:
+    external: true
+  internal_services:
+    name: internal_services
+    internal: true
 ...