docs/customizations: Move customization examples to dedicated folder

With the objective of improving our README, customization examples are being moved to a dedicated folder under `docs/`.

Signed-off-by: ArthurSens <arthursens2005@gmail.com>

docs/customizations/strip-limits.md

@@ -0,0 +1,23 @@
+### Stripping container resource limits
+
+Sometimes in small clusters, the CPU/memory limits can get high enough for alerts to be fired continuously. To prevent this, one can strip off the predefined limits.
+To do that, one can import the following mixin
+
+```jsonnet mdox-exec="cat examples/strip-limits.jsonnet"
+local kp = (import 'kube-prometheus/main.libsonnet') +
+           (import 'kube-prometheus/addons/strip-limits.libsonnet') + {
+  values+:: {
+    common+: {
+      namespace: 'monitoring',
+    },
+  },
+};
+
+{ ['00namespace-' + name]: kp.kubePrometheus[name] for name in std.objectFields(kp.kubePrometheus) } +
+{ ['0prometheus-operator-' + name]: kp.prometheusOperator[name] for name in std.objectFields(kp.prometheusOperator) } +
+{ ['node-exporter-' + name]: kp.nodeExporter[name] for name in std.objectFields(kp.nodeExporter) } +
+{ ['kube-state-metrics-' + name]: kp.kubeStateMetrics[name] for name in std.objectFields(kp.kubeStateMetrics) } +
+{ ['alertmanager-' + name]: kp.alertmanager[name] for name in std.objectFields(kp.alertmanager) } +
+{ ['prometheus-' + name]: kp.prometheus[name] for name in std.objectFields(kp.prometheus) } +
+{ ['grafana-' + name]: kp.grafana[name] for name in std.objectFields(kp.grafana) }
+```