Add grapi-explorer (#215)

* grapi explorer is located in its own (optional) file
* update readme
* optimize eclint check

web/kweb.cfg

@@ -1,4 +1,4 @@
-{%FQDN%}:80, :80 {
+{%FQDN%}:80, *:80 {
 	redir / https://{host}{uri}
 }
 
@@ -103,7 +103,6 @@
 	}
 	folderish /kapi-playground
 
-
 	# Kwmserver
 	proxy /upstreams/kwmserver/ {
 		without /upstreams/kwmserver/
@@ -197,4 +196,11 @@
 		transparent
 	}
 	redir /password-reset /password-reset/
+
+	proxy /grapi-explorer/ http://kopano_grapi-explorer:3000/ {
+		fail_timeout 10s
+		try_duration 30s
+		transparent
+		keepalive 100
+	}
 }