add function to overwrite snake config when its set as env and use smaller python alpine container as base

server/Server.py

@@ -63,9 +63,15 @@ class Server:
   def _read_json_config_or_create(self):
     snake_config = read_file(self.config_file, json.load)
     if not snake_config:
-      snake_config = self.default_snake_config
+      snake_config = self._override_snake_config_with_environment_variables(self.default_snake_config)
       save_file(self.config_file, snake_config, callback=json.dump, indent=2, ensure_ascii=False)
-    return snake_config
+    return self._override_snake_config_with_environment_variables(snake_config)
+
+  def _override_snake_config_with_environment_variables(self, config:dict[str]):
+    for key in ["color", "head", "tail"]:
+      if os.environ.get(f"SNAKE_{key.upper()}", None):
+        config[key.lower()] = os.environ.get(f"SNAKE_{key.upper()}")
+    return config
 
   def enable_store_game_state(self):
     self.store_game_state = True
@@ -75,8 +81,6 @@ class Server:
   # TIP: If you open your Battlesnake URL in a browser you should see this data
   def _info(self) -> dict:
     snake_config = self._read_json_config_or_create()
-    if os.environ.get("COLOR", None):
-      snake_config["color"] = os.environ.get("COLOR")
 
     print("INFO Snake:", snake_config)
     return snake_config