Updated README.md

Author: P-T-I

README.md

@@ -47,3 +47,8 @@ The cve_search instance should be available under https://localhost
  - Mongodb database dump exported via the `mongodump -d cvedb --gzip` command;
  - Redis db dump of the Redis CPE db;
 
+### Updating
+
+When a new update is pulled from the repo it is recommended to 
+- remove the .cve_search_data folder;
+- rebuild the docker images completely.