feat: add dynamic logging to js bootstrapper (#152)

To allow setting the log level dynamically, add a `/api/v0/nodejs/debug`
endpoint to the RPC server and curl to the docker image.

Set the log level with:

```
curl http://127.0.0.1:8899/api/v0/nodejs/log?namespace=libp2p*
```

Disable logging entirely with:

```
curl http://127.0.0.1:8899/api/v0/nodejs/log?namespace=
```

Also refactors the RPC server handlers into a Record to remove the
growing if/else if/else if.

Author: achingbrain

Dockerfile

@@ -2,7 +2,7 @@ FROM --platform=${BUILDPLATFORM} node:20-slim as builder
 
 # Install dependencies required for building the app
 RUN apt-get update && \
-    apt-get install -y tini && \
+    apt-get install -y tini curl && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/*
 
@@ -22,6 +22,7 @@ WORKDIR /app
 
 COPY --from=builder /app ./
 COPY --from=builder /usr/bin/tini /usr/bin/tini
+COPY --from=builder /usr/bin/curl /usr/bin/curl
 
 HEALTHCHECK --interval=60s --timeout=30s --start-period=10s CMD node dist/src/health-check.js