Fix typo

Dockerfile

@@ -15,7 +15,7 @@ COPY ./bakerydemo/requirements/* /code/requirements/
 RUN pip install --upgrade pip \
     && pip install -r /code/requirements/production.txt
 
-# Install wagtail from the host. This folder will be overriteen by a volume mount during run time (so that code
+# Install wagtail from the host. This folder will be overwritten by a volume mount during run time (so that code
 # changes show up immediately), but it also needs to be copied into the image now so that wagtail can be pip install'd.
 COPY ./wagtail /code/wagtail/
 RUN cd /code/wagtail/ \