[GraphBot] Add default docker network in configuration

pica-graphbot/config.json

@@ -7,6 +7,7 @@
 			"url": "pica01.picasoft.net",
 			"port": 2376,
 			"exclude": [],
+			"default_network": "docker_default",
 			"tls_config":
 			{
 				"ca_cert": "auth/pica01/ca.pem",
@@ -19,6 +20,7 @@
 			"url": "pica02.picasoft.net",
 			"port": 2376,
 			"exclude": [],
+			"default_network": "docker_default",
 			"tls_config":
 			{
 				"ca_cert": "auth/pica02/ca.pem",
@@ -31,6 +33,7 @@
 			"url": "pica01-test.picasoft.net",
 			"port": 2376,
 			"exclude": [],
+			"default_network": "docker_default",
 			"tls_config":
 			{
 				"ca_cert": "auth/pica01-test/ca.pem",
@@ -40,7 +43,8 @@
 		},
 		{
 			"name": "monitoring",
-			"url": "localhost"
+			"url": "localhost",
+			"default_network": "docker_default"
 		}
 	],
   "color_scheme": {