In your server.cfg file, you can add a number bot-related cvars, if you'd like. If you don't, the standard configuration file that you are loading will set them. Below, we list most of the customizable cvars, and give the baseline default value for each.
// 0 = bots will not be loaded in the game. 1 = bots are loaded.
// Sets the bot's default aiming skill.
// 0 = EASY, 1 = MEDIUM, 2 = EXPERT, 3 = MASTER
// 0 = bots let the player play the hero, with the bots filling a supporting role,
// 1 = bots do all the major objectives along with the player
// Keep a minimum number of clients on the server with bots and humans. -1 to disable
// 16 means to keep the server full of players (bots or clients).
// Has the bots stop thinking when the server is idle and there are no humans playing,
// to conserve CPU.
// The number of Resistance bots to add to the server. -1 to disable
// The number of Security bots to add to the server. -1 to disable