Start nginx after letsencrypt configuration

debian/gitlab.postinst

@@ -228,6 +228,10 @@ case "$1" in
 	    echo "Stop your webserver and try running letsencrypt manually..."
 	    echo "$LETSENCRYPT_CMD"
 	  }
+          if command -v nginx > /dev/null; then
+		  echo "Starting nginx (letsencrypt configuration completed) ..."
+	    invoke-rc.d nginx start
+	  fi
         fi 
       fi
     else