Added kubernetes and docker swarm to main TOC. (#497)

docs/operating/databases/boltdb.md

@@ -0,0 +1,11 @@
+# IronFunctions using BoltDB
+
+BoltDB is the default database, you just need to run the API.
+
+## Persistent
+
+To keep it persistent, add a volume flag to the command:
+
+```
+docker run --rm -it --privileged -v $PWD/bolt.db:/app/bolt.db -p 8080:8080 iron/functions
+```