fix(data): Use /data for persisting files and file caches (#295)

Moves sentry-data volume to /data mount point and sets all file-based storage settings to /data/files, /data/dsym-cache etc. accordingly. See 50ac550666/src/sentry/options/defaults.py (L45-L54)

install.sh

@@ -130,6 +130,10 @@ until $(docker-compose run --rm clickhouse clickhouse-client -h clickhouse --que
 done;
 echo ""
 
+echo "Migrating file storage..."
+docker run --rm -it -v sentry-data:/data alpine ash -c \
+  "mkdir -p /tmp/files; mv /data/* /tmp/files/; mv /tmp/files /data/files"
+
 cleanup
 
 echo ""