Prometheus adapter for axios

Local test

1. start a local docker image on your computer:

   docker run \
   -p 9090:9090 \
   -v /path/to/prometheus.yml:/etc/prometheus/prometheus.yml \
   prom/prometheus

   In the prometheus.yml set the example server url to enable metrics scraping of your application
2. Build the package source code:

   npm run build

3. Start example file which makes two http requests and use adapter to create prometheus logs on the /metrics route:

   node .\dist\example\axiosRequest.js