Add generated examples to cached build directory

Author: PProfizi

doc/source/conf.py

@@ -197,7 +197,7 @@ def reset_servers(gallery_conf, fname, when):
     # abort build at first example error
     'abort_on_example_error': True,
     # path where to save gallery generated examples
-    "gallery_dirs": ["examples"],
+    "gallery_dirs": ["../build/examples"],
     # Pattern to search for example files
     "filename_pattern": r"\.py",
     # Pattern to search for example files to be ignored
@@ -405,4 +405,4 @@ def reset_servers(gallery_conf, fname, when):
 
 BUILD_EXAMPLES = True if os.environ.get("BUILD_EXAMPLES", "true") == "true" else False
 if BUILD_EXAMPLES:
-    extensions.extend(["sphinx_gallery.gen_gallery"])
+    extensions.extend(["sphinx_gallery.gen_gallery"])