Merge branch 'traefik-v2' into 'master'

Migrate to Traefik v2

See merge request picasoft/projets/dockerfiles!53

pica-graphbot/config.json

@@ -7,7 +7,7 @@
 			"url": "pica01.picasoft.net",
 			"port": 2376,
 			"exclude": [],
-			"default_network": "docker_default",
+			"default_network": "proxy",
 			"tls_config":
 			{
 				"ca_cert": "auth/pica01/ca.pem",
@@ -20,7 +20,7 @@
 			"url": "pica02.picasoft.net",
 			"port": 2376,
 			"exclude": [],
-			"default_network": "docker_default",
+			"default_network": "proxy",
 			"tls_config":
 			{
 				"ca_cert": "auth/pica02/ca.pem",
@@ -33,7 +33,7 @@
 			"url": "pica01-test.picasoft.net",
 			"port": 2376,
 			"exclude": [],
-			"default_network": "docker_default",
+			"default_network": "proxy",
 			"tls_config":
 			{
 				"ca_cert": "auth/pica01-test/ca.pem",
@@ -44,7 +44,7 @@
 		{
 			"name": "monitoring",
 			"url": "localhost",
-			"default_network": "docker_default"
+			"default_network": "proxy"
 		}
 	],
   "color_scheme": {