This is a To-Do application built using Golang, HTML, CSS, and JavaScript. The backend is powered by the Fiber framework and a PostgreSQL database.

• User authentication (sign-up and log-in)
• Task creation, updating, deletion
• Task status updates
• Task filtering by status
• Retrieve details of individual tasks

• Endpoint: POST /signup
• Description: Register a new user.
• Request Body:

  {
      "username": "string",
      "password": "string"
  }

• Response:

  {
      "message": "User created successfully."
  }

• Endpoint: POST /login
• Description: Authenticate a user and return a token.
• Request Body:

  {
      "username": "string",
      "password": "string"
  }

• Response:

  {
      "token": "jwt_token"
  }

• Endpoint: GET /users/{userId}
• Description: Retrieve user details by user ID.
• Request Headers:

  Authorization: Bearer jwt_token
  

• Response:

  {
      "userId": "integer",
      "username": "string"
  }

• Endpoint: POST /tasks
• Description: Create a new task.
• Request Headers:

  Authorization: Bearer jwt_token
  

• Request Body:

  {
      "title": "string",
      "description": "string",
      "status": "string"  // e.g., "pending", "completed"
  }

• Response:

  {
      "taskId": "integer",
      "message": "Task created successfully."
  }

• Endpoint: PUT /tasks/{taskId}
• Description: Update an existing task.
• Request Headers:

  Authorization: Bearer jwt_token
  

• Request Body:

  {
      "title": "string",
      "description": "string",
      "status": "string"  // e.g., "pending", "completed"
  }

• Response:

  {
      "message": "Task updated successfully."
  }

• Endpoint: DELETE /tasks/{taskId}
• Description: Delete a task by task ID.
• Request Headers:

  Authorization: Bearer jwt_token
  

• Response:

  {
      "message": "Task deleted successfully."
  }

• Endpoint: GET /tasks
• Description: Retrieve a list of tasks with optional filters.
• Request Headers:

  Authorization: Bearer jwt_token
  

• Request Parameters:
  • status (optional): Filter tasks by status (e.g., pending, completed).
• Response:

  {
      "tasks": [
          {
              "taskId": "integer",
              "title": "string",
              "description": "string",
              "status": "string",
              "createdAt": "datetime",
              "updatedAt": "datetime"
          },
          ...
      ]
  }

• Endpoint: GET /tasks/{taskId}
• Description: Retrieve details of a specific task by task ID.
• Request Headers:

  Authorization: Bearer jwt_token
  

• Response:

  {
      "taskId": "integer",
      "title": "string",
      "description": "string",
      "status": "string",
      "createdAt": "datetime",
      "updatedAt": "datetime"
  }

• Go 1.16 or later
• PostgreSQL
• Fiber framework
• HTML, CSS, JavaScript

1. Clone the repository:

   git clone https://github.com/yourusername/todo-app.git
   cd todo-app

2. Install dependencies:

   go get -u github.com/gofiber/fiber/v2
   go get -u github.com/gofiber/template/html/v2
   go get -u github.com/lib/pq

3. Set up the PostgreSQL database and update the connection string in the code:

   postgresql://<username>:<password>@<address>/<database_name>?sslmode=disable

4. Run the application:

   go run server.go

Access the application at http://localhost:3000.