Bitcoin favicon, more strategies, default timeframe 5m

- Add an SVG Bitcoin favicon and link it in index.html.
- New indicators: macd() and roc().
- Five new strategies: macd_trend, bollinger_reversion, donchian_breakout,
  ema_cross, momentum (plus the existing sma_cross, rsi_reversion).
- Default TIMEFRAME is now 5m (config, .env.example, compose, workflow, UI).

.gitea/workflows/deploy.yml

@@ -109,7 +109,7 @@ jobs:
       CRYPTO_MODE: ${{ vars.CRYPTO_MODE || 'paper' }}
       CRYPTO_EXCHANGE: ${{ vars.CRYPTO_EXCHANGE || 'binance' }}
       CRYPTO_SYMBOL: ${{ vars.CRYPTO_SYMBOL || 'BTC/USDT' }}
-      CRYPTO_TIMEFRAME: ${{ vars.CRYPTO_TIMEFRAME || '1m' }}
+      CRYPTO_TIMEFRAME: ${{ vars.CRYPTO_TIMEFRAME || '5m' }}
       CRYPTO_POLL_INTERVAL: ${{ vars.CRYPTO_POLL_INTERVAL || '5' }}
       CRYPTO_STARTING_BALANCE: ${{ vars.CRYPTO_STARTING_BALANCE || '10000' }}
       CRYPTO_CORS_ORIGINS: ${{ vars.CRYPTO_CORS_ORIGINS || format('https://crypto.{0}', secrets.BASE_DOMAIN || 'matitos.org') }}