PvPLeaderBoard Updater

Updates the World of Warcraft PvP leaderboard data consumed by pvpleaderboard

Use: run pvpleaderboard to update the $DB_URL database with the current data from Blizzard's API

Environment variables:

• DB_URL the URL of the [PostgreSQL] database to use (required)
• BATTLE_NET_CLIENT_ID battle.net Client ID (required)
• BATTLE_NET_SECRET battle.net Client ID (required)
• MAX_PER_BRACKET maximum number of players to retrieve per bracket (optional, will retrieve all players for each bracket if not set)
• GROUP_SIZE number of players each goroutine should handle when importing player details (optional)
• MAX_DB_CONNECTIONS maximum size of the DB connection pool (optional)