Allow configuration of different log formats: text, json

Signed-off-by: Vlad Ungureanu <vladu@palantir.com>

services/server/config/config.go

@@ -138,6 +138,8 @@ type Debug struct {
 	UID     int    `toml:"uid"`
 	GID     int    `toml:"gid"`
 	Level   string `toml:"level"`
+	// Format represents the logging format
+	Format string `toml:"format"`
 }
 
 // MetricsConfig provides metrics configuration