`start_neuron.sh` yes/no prompt is now skipped if variable is set + Added `FLASK_SERVER` miner-specific variables, related input parameter and skip for validators + Fixed `--use_bt_api` parameter and added skip when provided

[duotang12]

In this pull request I added:

1. A check in the prompt_yes_no() function of the start_neuron.sh script to skip the prompt if the variable is already set to true or false
   • This allows users to fully automate the usage of the script by passing --disable_auto_update and/or --start_flask_server
2. The FLASK_SERVER miner-specific variable to go with the new --start_flask_server input parameter
3. Only prompting for the FLASK_SERVER when starting a miner neuron
4. Fixed error where passing --use_bt_api parameter would throw an Unknown parameter passed error
5. Replaced --use_bt_api assigned variable to USE_BT_API_CHOICE in order to properly set USE_BT_API value later in the script and skip the prompt if passed to the script

I tested by using it to setup a validator and with this testing script:

USE_BT_API=""

DISABLE_AUTO_UPDATE=""
FLASK_SERVER=""

USE_BT_API_CHOICE=""

prompt_yes_no() {
    local prompt="$1"
    local var_name="$2"
    local current_value="${!var_name}"

    # Check if var_name is already set to 'true' or 'false'
    if [[ "$current_value" == "true" || "$current_value" == "false" ]]; then
      echo "$var_name is already set to $current_value, skipping prompt."
      return 0
    fi

    while true; do
        read -p "$prompt [y/n]: " yn
        case $yn in
            [Yy]* ) eval $var_name="true"; break;;
            [Nn]* ) eval $var_name="false"; break;;
            * ) echo "Please answer yes or no.";;
        esac
    done
}

while [[ $# -gt 0 ]]; do
    case $1 in
        --neuron_type) NEURON_TYPE="$2"; shift 2 ;;
        --disable_auto_update) DISABLE_AUTO_UPDATE="$2"; shift 2 ;;
        --start_flask_server) FLASK_SERVER="$2"; shift 2 ;;
        --use_bt_api) USE_BT_API_CHOICE="$2"; shift 2 ;;
        *) echo "Unknown parameter passed: $1"; exit 1 ;;
    esac
done

# Prompt for disabling auto-update if not provided
prompt_yes_no "Do you want to disable auto-update? Warning: this will apply to all running neurons" "DISABLE_AUTO_UPDATE"

# Prompt for starting flask server if not provided (only for miner)
if [ "$NEURON_TYPE" = "miner" ]; then
    # Prompt for starting Flask server
    prompt_yes_no "Would you like to start flask server for connecting to bettensor.com?" "FLASK_SERVER"
fi

if [ "$NEURON_TYPE" = "validator" ]; then
    if [ -z "$USE_BT_API" ]; then
        prompt_yes_no "Do you want to use the BT API?" "USE_BT_API_CHOICE"
        if [ "$USE_BT_API_CHOICE" = "true" ]; then
            USE_BT_API="--use_bt_api"
        fi
    fi
fi

echo $DISABLE_AUTO_UPDATE
echo $FLASK_SERVER
echo $USE_BT_API

Test outputs:

[geardici]

Closing this because it's behind now, but will review for future integration, thank you!