try fix static files on heroku

.gitignore

@@ -2,3 +2,4 @@ geckodriver.log
 __pycache__
 *.pyc
 .vscode
+/staticfiles

static/fail_base.css

+#id_new_item {
+    margin-top: 2ex;
+}
+
+#centering-div {
+    text-align: left;
+}
\ No newline at end of file

superlists/settings.py

@@ -135,4 +135,4 @@ USE_TZ = True
 # https://docs.djangoproject.com/en/2.2/howto/static-files/
 
 STATIC_URL = '/static/'
-STATIC_ROOT = os.path.join(BASE_DIR, 'static')
\ No newline at end of file
+STATIC_ROOT = os.path.abspath(os.path.join(BASE_DIR, 'static'))