webserver mode should properly validate config

freqtrade/commands/webserver_commands.py

@@ -7,9 +7,10 @@ def start_webserver(args: Dict[str, Any]) -> None:
     """
     Main entry point for webserver mode
     """
-    from freqtrade.configuration import Configuration
+    from freqtrade.configuration import setup_utils_configuration
     from freqtrade.rpc.api_server import ApiServer
 
     # Initialize configuration
-    config = Configuration(args, RunMode.WEBSERVER).get_config()
+
+    config = setup_utils_configuration(args, RunMode.WEBSERVER)
     ApiServer(config, standalone=True)

freqtrade/configuration/config_validation.py

@@ -51,6 +51,8 @@ def validate_config_schema(conf: Dict[str, Any], preliminary: bool = False) -> D
             conf_schema['required'] = constants.SCHEMA_BACKTEST_REQUIRED
         else:
             conf_schema['required'] = constants.SCHEMA_BACKTEST_REQUIRED_FINAL
+    elif conf.get('runmode', RunMode.OTHER) == RunMode.WEBSERVER:
+        conf_schema['required'] = constants.SCHEMA_MINIMAL_WEBSERVER
     else:
         conf_schema['required'] = constants.SCHEMA_MINIMAL_REQUIRED
     try:

freqtrade/constants.py

@@ -667,6 +667,9 @@ SCHEMA_MINIMAL_REQUIRED = [
     'dataformat_ohlcv',
     'dataformat_trades',
 ]
+SCHEMA_MINIMAL_WEBSERVER = SCHEMA_MINIMAL_REQUIRED + [
+    'api_server',
+]
 
 CANCEL_REASON = {
     "TIMEOUT": "cancelled due to timeout",