Setting up slack app

Create the New App

create app at https://api.slack.com/apps by clicking "Create New App"

Select "From an app manifest"

create_an_app

Copy&Paste to App Manifest JSON (JSON is below this image)

enter_app_manifest

App Manifest

{
  "display_information": {
    "name": "Minecraft server",
    "description": "with Slack Integration plugin",
    "background_color": "#49992c"
  },
  "features": {
    "app_home": {
      "home_tab_enabled": true,
      "messages_tab_enabled": false,
      "messages_tab_read_only_enabled": true
    },
    "bot_user": {
      "display_name": "Minecraft server",
      "always_online": true
    },
    "slash_commands": [
      {
        "command": "/mcserver",
        "description": "minecraft server command",
        "usage_hint": "time set day",
        "should_escape": false
      }
    ]
  },
  "oauth_config": {
    "scopes": {
      "bot": [
        "channels:history",
        "channels:write.topic",
        "chat:write",
        "chat:write.customize",
        "users:read",
        "commands"
      ]
    }
  },
  "settings": {
    "event_subscriptions": {
      "bot_events": [
        "app_home_opened",
        "message.channels"
      ]
    },
    "interactivity": {
      "is_enabled": true
    },
    "org_deploy_enabled": false,
    "socket_mode_enabled": true,
    "token_rotation_enabled": false
  }
}