vicky :)

[CON-435] - Track metrics content stream

4

### Description In this PR: - adds metrics to the `/ipfs/` and `/ipfs//` routes - prometheus labels in the prometheus constants file + metric mapping for ipfs route - updates...

Add typescript to `apiSigning.js`

1

### Description One of our goals is to add typescript to Content Node code base. Here is a start: adding typescript to `apiSigning.js` ### Tests No functionality changes, just converting...

### Description ### Tests ### Monitoring - How will this change be monitored? Are there sufficient logs / alerts?

### Description ### Tests ### Monitoring - How will this change be monitored? Are there sufficient logs / alerts?

### Description This PR is to: - pass in the self content node endpoint to prevent a node from rolling itself off of a replica set - refactor code slightly...