Add initial project setup for TLS Checker with Prettier integration

- Created a new README.md file outlining the features, installation, and usage of the TLS Checker application.
- Added package.json and package-lock.json to manage Prettier as a development dependency for code formatting.
- Updated .gitignore to exclude node_modules and the new tls-checker directory.

This commit establishes the foundational documentation and development environment for the TLS Checker application, enhancing code quality and usability.

.gitignore

@@ -1,3 +1,5 @@
 *.pem
 *.crt
 *.key
+node_modules
+tls-checker

README.md

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+# TLS Checker
+
+A command-line tool for testing TLS connections with both HTTP and RabbitMQ servers.
+
+## Features
+
+- HTTP server with TLS support
+- RabbitMQ server with TLS support (using Docker)
+- HTTP client for testing TLS connections
+- AMQP client for testing RabbitMQ TLS connections
+- Configurable via command line flags or config file
+
+## Installation
+
+### Prerequisites
+
+- Go 1.19 or later
+- Docker (for RabbitMQ server functionality)
+
+### Installing from source
+
+```bash
+go install https://github.com/frgrisk/tls-checker@latest
+```
+
+## Usage
+
+### Running HTTP Server
+
+```bash
+tls-checker server --cert cert.pem --key key.pem --addr localhost:8443
+```
+
+### Running RabbitMQ Server
+
+```bash
+tls-checker server --rabbitmq --cert cert.pem --key key.pem
+```
+
+### Testing HTTP Connection
+
+```bash
+tls-checker client --ca rootCA.pem --addr localhost:8443
+```
+
+### Testing RabbitMQ Connection
+
+```bash
+tls-checker client --rabbitmq --ca rootCA.pem --addr localhost:5671
+```
+
+## Configuration
+
+Configuration can be provided via command-line flags or a config file (`$HOME/.tlsapp.yaml`).
+
+### Command-line Flags
+
+- `--config`: Path to config file (default: `$HOME/.tlsapp.yaml`)
+- `--cert`: Path to certificate file (default: `cert.pem`)
+- `--key`: Path to private key file (default: `key.pem`)
+- `--ca`: Path to root CA certificate (default: `rootCA.pem`)
+- `--addr`: Address to serve on or connect to (default: `localhost:8443`)
+
+### Server-specific Flags
+
+- `--rabbitmq`: Run RabbitMQ server instead of HTTP server
+
+### Config File Format
+
+```yaml
+cert: "cert.pem"
+key: "key.pem"
+ca: "rootCA.pem"
+addr: "localhost:8443"
+```
+
+## RabbitMQ Server Details
+
+When running the RabbitMQ server:
+
+- AMQPS port: 5671
+- Management UI:
+  - HTTP: http://localhost:15672
+  - HTTPS: https://localhost:15671
+- Default credentials: guest/guest
+
+## Security Notes
+
+- The tool uses TLS 1.2+ for secure communications
+- Certificate verification is enabled by default
+- RabbitMQ server is run in a Docker container with proper TLS configuration

package.json

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+{
+  "devDependencies": {
+    "prettier": "3.4.2"
+  }
+}