do some things with docker which I don't really understand

Dockerfile

@@ -33,6 +33,7 @@ VOLUME /cryptpad/tasks
 VOLUME /cryptpad/block
 VOLUME /cryptpad/blob
 VOLUME /cryptpad/blobstage
+VOLUME /cryptpad/data
 
 # Copy cryptpad and tini from the build container
 COPY --from=build /sbin/tini /sbin/tini
@@ -44,4 +45,4 @@ WORKDIR /cryptpad
 EXPOSE 3000 3001
 
 # Run cryptpad on startup
-CMD ["/sbin/tini", "--", "/cryptpad/container-start.sh"]
+CMD ["/sbin/tini", "--", "/cryptpad/container-start.sh"]

docker-compose.yml

@@ -31,3 +31,4 @@ services:
       - ./data/tasks:/cryptpad/tasks:rw
       - ./data/block:/cryptpad/block:rw
       - ./data/config:/cryptpad/cfg:rw
+      - ./data/data:/cryptpad/data:rw