C4Container
  title {{SYSTEM_NAME}} Container Diagram

  Person(user, "{{USER_TYPE}}", "{{USER_DESCRIPTION}}")

  System_Boundary(boundary, "{{SYSTEM_NAME}}") {
    Container(webapp, "{{WEB_APP_NAME}}", "{{WEB_TECH}}", "{{WEB_APP_DESCRIPTION}}")
    Container(api, "{{API_NAME}}", "{{API_TECH}}", "{{API_DESCRIPTION}}")
    Container(worker, "{{WORKER_NAME}}", "{{WORKER_TECH}}", "{{WORKER_DESCRIPTION}}")
    ContainerDb(db, "{{DATABASE_NAME}}", "{{DB_TECH}}", "{{DATABASE_DESCRIPTION}}")
    ContainerDb(cache, "{{CACHE_NAME}}", "Redis", "{{CACHE_DESCRIPTION}}")
  }

  System_Ext(external, "{{EXTERNAL_SYSTEM}}", "{{EXTERNAL_DESCRIPTION}}")

  %% User interactions
  Rel(user, webapp, "{{USER_WEB_INTERACTION}}", "HTTPS")

  %% Internal relationships
  Rel(webapp, api, "{{WEB_TO_API}}", "JSON/HTTPS")
  Rel(api, db, "Reads/writes data", "SQL/TCP")
  Rel(api, cache, "Caches data", "Redis Protocol")
  Rel(api, worker, "Queues jobs", "Message Queue")
  Rel(worker, db, "Reads/writes data", "SQL/TCP")

  %% External integrations
  Rel(api, external, "{{API_TO_EXTERNAL}}", "HTTPS")

%% Template Variables:
%% {{SYSTEM_NAME}} - Name of your system
%% {{USER_TYPE}} - Type of user
%% {{USER_DESCRIPTION}} - User description
%% {{WEB_APP_NAME}} - Frontend application name
%% {{WEB_TECH}} - Frontend tech stack (e.g., "React, TypeScript")
%% {{WEB_APP_DESCRIPTION}} - What the frontend does
%% {{API_NAME}} - Backend API name
%% {{API_TECH}} - Backend tech stack (e.g., "Node.js, Express")
%% {{API_DESCRIPTION}} - What the API does
%% {{WORKER_NAME}} - Background worker name
%% {{WORKER_TECH}} - Worker tech (e.g., "Node.js, Bull")
%% {{WORKER_DESCRIPTION}} - What worker processes
%% {{DATABASE_NAME}} - Database name
%% {{DB_TECH}} - Database technology (e.g., "PostgreSQL", "MongoDB")
%% {{DATABASE_DESCRIPTION}} - What data is stored
%% {{CACHE_NAME}} - Cache name
%% {{CACHE_DESCRIPTION}} - What is cached
%% {{EXTERNAL_SYSTEM}} - External system name
%% {{EXTERNAL_DESCRIPTION}} - External system description