Read build_dir from ~/.config/newegg-hdd/config

Config file uses INI format:

  [newegg-hdd]
  build_dir = /path/to/output

Falls back to output/ in the script directory if the config file or
key is absent.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

crawl.py

@@ -2,6 +2,7 @@
 """Crawl newegg.com for storage prices."""
 
 import collections
+import configparser
 import decimal
 import logging
 import os
@@ -332,9 +333,20 @@ def group_items(
         yield {"name": name, "label": label, "items": items}
 
 
+def get_build_root() -> str:
+    """Read build_dir from ~/.config/newegg-hdd/config, fall back to output/."""
+    config_path = os.path.expanduser("~/.config/newegg-hdd/config")
+    if os.path.exists(config_path):
+        config = configparser.ConfigParser()
+        config.read(config_path)
+        if config.has_option("newegg-hdd", "build_dir"):
+            return config.get("newegg-hdd", "build_dir")
+    return os.path.join(root_dir, "output")
+
+
 def build() -> None:
     """Build."""
-    build_root = os.path.join(root_dir, "output")
+    build_root = get_build_root()
     today = date.today()
 
     templates_dir = os.path.join(root_dir, "templates")