Add readme for init.py and init.sh

scripts/init/README.md

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+
+# README.md for `init.py`
+
+## Overview
+The `init.py` script is designed to automate the process of registering credentials and loading common specifications and images for a Tumblebug server. It can be executed directly or via the `init.sh` script which sets up a Python virtual environment. This script ensures the Tumblebug server is healthy before proceeding and performs several network operations in a secure and managed way.
+
+## Features
+- **Health Check**: Verifies that the Tumblebug server is ready to handle requests before proceeding with operations.
+- **Credential Registration**: Dynamically registers all valid credentials stored in a YAML file to the Tumblebug server.
+- **Resource Loading**: Initiates the loading of common specs and images into Tumblebug.
+
+## Prerequisites
+- Python 3.x installed
+- Python packages listed in `requirements.txt`
+- The `python3-venv` package should be installed for running the script using `init.sh`.
+
+## Usage
+### Direct Execution
+```bash
+pip3 install -r requirements.txt
+```
+
+```bash
+python3 init.py
+```
+
+- Options: `-y, --yes` (Automatically answer yes to prompts and proceed without manual confirmation)
+
+### Execution via Script
+```bash
+init.sh
+```
+- Options: `-y, --yes` (Automatically answer yes to prompts and proceed without manual confirmation)
+
+## Configuration
+Before running the script, ensure the following environment variables are set according to your Tumblebug server configuration:
+- `TUMBLEBUG_SERVER`: The address of the Tumblebug server.
+- `API_USERNAME`: Username for API authentication.
+- `API_PASSWORD`: Password for API authentication.
+
+
+## Related Files
+- `init.py`: Main Python script.
+- `requirements.txt`: Contains all Python dependencies.
+- `init.sh`: Bash script for setting up a Python virtual environment and running `init.py`.
+- `credentials.yaml`: Contains the credentials data to be registered with the Tumblebug server.