Netdata: add monitoring for postgresql databases

files/netdata/docker-compose.yml.j2

@@ -2,7 +2,7 @@
 services:
 
   netdata:
-    image: netdata/netdata:v2.6.0
+    image: netdata/netdata:v2.6.1
     container_name: netdata
     restart: unless-stopped
     cap_add:
@@ -11,7 +11,8 @@ services:
     security_opt:
       - apparmor:unconfined
     networks:
-      - "{{ web_proxy_network }}"
+      - "web_proxy_network"
+      - "monitoring_network"
     volumes:
       - "{{ config_dir }}:/etc/netdata"
       - "{{ (data_dir, 'lib') | path_join }}:/var/lib/netdata"
@@ -33,5 +34,7 @@ services:
       NETDATA_EXTRA_DEB_PACKAGES: "fail2ban"
 
 networks:
-  {{ web_proxy_network }}:
+  web_proxy_network:
+    external: true
+  monitoring_network:
     external: true