Notice

Used an idea and modified following files from https://github.com/blind-oracle/nginx-prometheus
- [main.go](https://github.com/blind-oracle/nginx-prometheus/blob/master/main.go)
- [prometheus.go](https://github.com/blind-oracle/nginx-prometheus/blob/master/prometheus.go)
- [parser.go](https://github.com/blind-oracle/nginx-prometheus/blob/master/parser.go)

Original MPL-2.0 License headers are preserved for those files:
- [main.go](https://github.com/NethermindEth/jrpc-interceptor/blob/main/main.go)
- [parser.go](https://github.com/NethermindEth/jrpc-interceptor/blob/main/parser.go)
- [prometheus.go](https://github.com/NethermindEth/jrpc-interceptor/blob/main/prometheus.go)