README: add migrate instructions

README.md

@@ -36,6 +36,10 @@ $ psql -f schema.sql litecord
 # edit config.py as you wish
 $ cp config.example.py config.py
 
+# run database migrations (this is a
+# required step in setup)
+$ pipenv run ./manage.py migrate
+
 # Install all packages:
 $ pipenv install --dev
 ```
@@ -50,3 +54,10 @@ Use `--access-log -` to output access logs to stdout.
 ```sh
 $ pipenv run hypercorn run:app
 ```
+
+## Updating
+
+```sh
+$ git pull
+$ pipenv run ./manage.py migrate
+```