This project is a simple authentication service built with Go, using JWT for authentication and Docker for containerization. It now uses Redis for storing user credentials.

1. Initialization: The application loads environment variables using godotenv and initializes the JWT secret key.
2. Routing: The application uses Gorilla Mux to handle HTTP requests and routes them to the appropriate handlers.
3. Authentication: JWT is used for authentication, with middleware to protect certain endpoints.
4. Token Management: Tokens can be generated, validated, refreshed, and revoked.
5. User Storage: User credentials are stored in Redis.

• URL: /signup
• Method: POST
• Description: Registers a new user.
• Request Body: JSON containing email and password.
• Curl Command:

  curl -X POST http://localhost:8000/signup -H "Content-Type: application/json" -d '{"email":"user@example.com", "password":"password123"}'

• URL: /signin
• Method: POST
• Description: Authenticates a user and returns a JWT.
• Request Body: JSON containing email and password.
• Curl Command:

  curl -X POST http://localhost:8000/signin -H "Content-Type: application/json" -d '{"email":"user@example.com", "password":"password123"}'

• URL: /refresh
• Method: POST
• Description: Refreshes an existing JWT if it's close to expiration.
• Headers: Authorization: Bearer <token>
• Curl Command:

  curl -X POST http://localhost:8000/refresh -H "Authorization: Bearer <token>"

• URL: /revoke
• Method: POST
• Description: Revokes a JWT.
• Headers: Authorization: Bearer <token>
• Curl Command:

  curl -X POST http://localhost:8000/revoke -H "Authorization: Bearer <token>"

• URL: /protected
• Method: GET
• Description: Accesses a protected resource.
• Headers: Authorization: Bearer <token>
• Curl Command:

  curl -X GET http://localhost:8000/protected -H "Authorization: Bearer <token>"

• JWT_SECRET: Secret key used for signing JWTs. This should be set in a .env file.
• REDIS_URL: URL for the Redis service, typically redis:6379 when using Docker Compose.

The Dockerfile is used to build the application image. It should be located in the root directory of your project.

The docker-compose.yml file is used to define and run multi-container Docker applications, including the Redis service.

1. Build and Run with Docker Compose:

   docker-compose up --build

2. Access the Application: The application will be available at http://localhost:8000.