Renames fr_celery dir to celerywyrm

Dockerfile

@@ -6,5 +6,5 @@ RUN mkdir /app/images
 WORKDIR /app
 COPY requirements.txt /app/
 RUN pip install -r requirements.txt
-COPY ./fedireads /app
-COPY ./fr_celery /app
+COPY ./bookwyrm /app
+COPY ./celerywyrm /app