docs(bitget): add bitget documentation

Author: xmatthias

docs/exchanges.md

@@ -328,6 +328,22 @@ It's therefore required to pass the UID as well.
 !!! Warning "Necessary Verification"
     Bitmart requires Verification Lvl2 to successfully trade on the spot market through the API - even though trading via UI works just fine with just Lvl1 verification.
 
+## Bitget
+
+Kucoin requires a passphrase for each api key, you will therefore need to add this key into the configuration so your exchange section looks as follows:
+
+```json
+"exchange": {
+    "name": "bitget",
+    "key": "your_exchange_key",
+    "secret": "your_exchange_secret",
+    "password": "your_exchange_api_key_password",
+    // ...
+}
+```
+
+Bitget supports [time_in_force](configuration.md#understand-order_time_in_force).
+
 ## Hyperliquid
 
 !!! Tip "Stoploss on Exchange"