add server Context option to pass own context

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

web/options.go

@@ -126,18 +126,21 @@ func Context(ctx context.Context) Option {
 	}
 }
 
+// Registry used for discovery
 func Registry(r registry.Registry) Option {
 	return func(o *Options) {
 		o.Registry = r
 	}
 }
 
+// Register the service with a TTL
 func RegisterTTL(t time.Duration) Option {
 	return func(o *Options) {
 		o.RegisterTTL = t
 	}
 }
 
+// Register the service with at interval
 func RegisterInterval(t time.Duration) Option {
 	return func(o *Options) {
 		o.RegisterInterval = t