do you know any websites that can provide me hosting for my dashboard ?
If you are talking about a Node-RED Dashboard, then you need something that can host Node-RED. IBM's Cloudant has this available or you can run Node-RED on any cloud platform that supports running Node.JS apps.
Just to clarify, IBM Cloudant is a hosted database service. You can deploy Node-RED to IBM Cloud and it will use cloudant under the covers to store flow config.
There are docs for this and other cloud providers on nodered.org.