relationship.dot

digraph relationship {
  graph [
    charset = "UTF-8";
  ];


  rest_api [label="REST API Server", shape = box];

  discord_bot [label="Discord Bot"];

  slack_bot [label="Slack Bot"];

  web_app [label="Web Application"];

  rest_api -> discord_bot [arrowhead = normal];
  discord_bot -> rest_api [label = "POST or GET", arrowhead = normal];

  rest_api -> slack_bot [arrowhead = normal];
  slack_bot -> rest_api [label = "POST or GET", arrowhead = normal];

  rest_api -> web_app [arrowhead = normal];
  web_app -> rest_api [label = "POST or GET", arrowhead = normal];
}