move snake config read functions into battlesnake template and use TemplateSnake as default Version of Snakes

server/blueprints/battlesnake.py

@@ -5,7 +5,9 @@ from quart import Blueprint, request, jsonify
 
 from quart_common.web.logger import await_log
 from server.database import StorageLoader
+from snakes import DEFAULT_SNAKE_CONFIG
 from server.GameBoard import GameBoard
+from server.Files import read_file
 
 if TYPE_CHECKING:
   from server.Server import Server
@@ -13,12 +15,33 @@ if TYPE_CHECKING:
 def create_battlesnake_blueprint(server:'Server') -> Blueprint:
   blueprint = Blueprint('battlesnake', __name__)
 
+  async def _override_snake_config_with_environment_variables(config:dict[str, str]) -> dict[str, str]:
+    print(config)
+    config['version'] = server.snake_version
+
+    for key in ('author', 'color', 'head', 'tail'):
+      value = os.environ.get(f'SNAKE_{key.upper()}')
+      if value is not None:
+        config[key] = value
+
+    version_override = os.environ.get('SNAKE_VERSION')
+    if version_override is not None:
+      config['version'] = version_override
+
+    return config
+
   @blueprint.get('/')
   async def on_info():
     server.metrics_collector.record_http_request('info')
-    snake_config = await server._read_json_config_or_create()
-    await await_log(server.logger.info(f'INFO Snake: {snake_config}'))
-    return snake_config
+
+    snake_config = cast(dict[str, str]|None, await read_file(server.config_file, json.load))
+    if not snake_config:
+      snake_json = await _override_snake_config_with_environment_variables(DEFAULT_SNAKE_CONFIG)
+    else:
+      snake_json = await _override_snake_config_with_environment_variables(snake_config)
+
+    await await_log(server.logger.info(f'INFO Snake: {snake_json}'))
+    return snake_json
 
   @blueprint.post('/start')
   async def on_start():