[Enhancement] Add Prometheus support (#556)

* Added prometheus to deps list

* WIP - screwing around with Prometheus and grafana

* Added basic prometheus config

* Updated docs in prom_ex module

* Updated README

mix.exs

@@ -60,9 +60,9 @@ defmodule Pinchflat.MixProject do
       {:esbuild, "~> 0.8", runtime: Mix.env() == :dev},
       {:tailwind, "~> 0.2.0", runtime: Mix.env() == :dev},
       {:swoosh, "~> 1.3"},
-      {:finch, "~> 0.13"},
-      {:telemetry_metrics, "~> 0.6"},
-      {:telemetry_poller, "~> 1.0"},
+      {:finch, "~> 0.18"},
+      {:telemetry_metrics, "~> 1.0"},
+      {:telemetry_poller, "~> 1.1"},
       {:gettext, "~> 0.20"},
       {:jason, "~> 1.2"},
       {:dns_cluster, "~> 0.1.1"},
@@ -70,6 +70,7 @@ defmodule Pinchflat.MixProject do
       {:oban, "~> 2.17"},
       {:nimble_parsec, "~> 1.4"},
       {:timex, "~> 3.0"},
+      {:prom_ex, "~> 1.11.0"},
       {:mox, "~> 1.0", only: :test},
       {:credo, "~> 1.7.7", only: [:dev, :test], runtime: false},
       {:credo_naming, "~> 2.1", only: [:dev, :test], runtime: false},