diff --git a/.envrc b/.envrc
index dec84b6..16e549a 100644
--- a/.envrc
+++ b/.envrc
@@ -1,2 +1,2 @@
-export FLASK_APP=app
+export FLASK_APP="app:create_app()"
 export FLASK_DEBUG=1
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..494abed
--- /dev/null
+++ b/README.md
@@ -0,0 +1,7 @@
+yarn
+yarn install
+yarn build
+source .envrc
+flask digest clean
+flask db upgrade
+flask run
diff --git a/app/settings.py b/app/settings.py
index ad24b62..0f55be8 100644
--- a/app/settings.py
+++ b/app/settings.py
@@ -22,7 +22,6 @@ class SettingsForm(FlaskForm):
         'Start of day hour',
         widget=NumberInput(min=0, max=23),
         validators=[
-            DataRequired(),
             NumberRange(min=0, max=23)
         ]
     )