| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/prometheus/client_golang/prometheus | Package prometheus is the core instrumentation package. |
| github.com/prometheus/client_golang/prometheus/collectors | Package collectors provides implementations of prometheus.Collector to conveniently collect process and Go-related metrics. |
| github.com/prometheus/client_golang/prometheus/promhttp | Package promhttp provides tooling around HTTP servers and clients. |
| log | Package log implements a simple logging package. |
| math/rand | Package rand implements pseudo-random number generators suitable for tasks such as simulation, but it should not be used for security-sensitive work. |
| net/http | Package http provides HTTP client and server implementations. |
| time | Package time provides functionality for measuring and displaying time. |