Update requirements page. (#179)

Signed-off-by: Hannah Troisi <htroisi@pixielabs.ai>

Author: htroisi

content/en/02-installing-pixie/01-requirements.md

@@ -5,14 +5,24 @@ metaDescription: "Resource requirements to install Pixie"
 order: 1
 ---
 
-Below are the requirements for deploying Pixie to your Kubernetes (K8s) cluster.
+Before installing Pixie to your Kubernetes cluster, please ensure that your system meets the requirements below.
+
+- [Kubernetes Environment](/installing-pixie/requirements/#kubernetes)
+- [Operating System](/installing-pixie/requirements/#operating-system)
+- [CPU](/installing-pixie/requirements/#cpu)
+- [Memory](/installing-pixie/requirements/#memory)
+- [Network](/installing-pixie/requirements/#network-traffic)
 
 Please refer to the [install guides](/installing-pixie/install-guides/) for information on how to install Pixie to your K8s cluster.
 
 ## Kubernetes
 
 Kubernetes `v1.16+` is required.
 
+The following tables list Kubernetes environments that have been tested with Pixie.
+
+<Alert variant="outlined" severity="info">Pixie may work on other K8s environments. If you find an unlisted K8s environment that works well, please let us know by opening a GitHub issue or by creating a pull request that updates <a href="https://github.com/pixie-io/docs.px.dev/blob/main/content/en/02-installing-pixie/01-requirements.md">this doc</a>.</Alert>
+
 ### Production Environments
 
 | K8s Environment  | Support                                                         |
@@ -43,25 +53,6 @@ For local development, we recommend using Minikube with a VM driver (`kvm2` on L
 | minikube with `driver=docker`   | Not Supported |
 | minikube with `driver=none`     | Not Supported |
 
-## Memory
-
-Pixie requires the following memory per node:
-
-| Minimum   | Notes                                                                  |
-| :-------- | :--------------------------------------------------------------------- |
-| 1GiB      | To accommodate application pods, we recommend using no more than 25% of the nodes' total memory for Pixie.  |
-
-Pixie deploys its PEMs as a DaemonSet on your cluster in order to collect and store telemetry data. The default memory limit is 2Gi per PEM. The lowest recommended value is 1Gi per PEM. For more information on how to configure Pixie's memory usage, see the [Tuning Memory Usage](/reference/admin/tuning-mem-usage/) page.
-
-## CPU
-
-Pixie requires an `x86-64` architecture.
-
-|         | Support           |
-| :------ | :---------------- |
-| x86-64  | Supported         |
-| ARM     | Not supported     |
-
 ## Operating System
 
 Pixie runs on Linux nodes only. You can configure Pixie to [deploy to a subset of the nodes](/reference/admin/deploy-options#deploy-pixie-to-a-subset-of-nodes) in your cluster.
@@ -71,20 +62,38 @@ Pixie runs on Linux nodes only. You can configure Pixie to [deploy to a subset o
 | Linux   | Supported       | v4.14+            |
 | Windows | Not Supported   | Not in roadmap    |
 
-### Linux Distributions
+### Linux Distribution
 
-The following is a list of Linux distributions that have been tested.
+The following table lists Linux distributions that are known to work with Pixie.
 
 |              |  Version              |
 |:-----------  |  :------------------- |
-| Ubuntu       |  18.04+               |
+| CentOS       |  7.3+                 |
 | Debian       |  10+                  |
-| RHEL         |  8+                   |
-| CentOS       |  7.3+                  |
-
-Pixie may also work on other distributions.
+| RedHat Enterprise Linux |  8+        |
+| Ubuntu       |  18.04+               |
 
 <Alert variant="outlined" severity="info">We recommended that Linux headers be installed on a cluster's nodes.</Alert>
+<Alert variant="outlined" severity="info">Pixie may also work on other distributions. If you find an unlisted Linux distribution that works well, please let us know by opening a GitHub issue or by creating a pull request that updates <a href="https://github.com/pixie-io/docs.px.dev/blob/main/content/en/02-installing-pixie/01-requirements.md">this doc</a>.</Alert>
+
+## CPU
+
+Pixie requires an `x86-64` architecture.
+
+|         | Support           |
+| :------ | :---------------- |
+| x86-64  | Supported         |
+| ARM     | Not Supported     |
+
+## Memory
+
+Pixie requires the following memory per node:
+
+| Minimum   | Notes                                                                  |
+| :-------- | :--------------------------------------------------------------------- |
+| 1GiB      | To accommodate application pods, we recommend using no more than 25% of the nodes' total memory for Pixie.  |
+
+Pixie deploys its PEMs as a DaemonSet on your cluster in order to collect and store telemetry data. The default memory limit is 2Gi per PEM. The lowest recommended value is 1Gi per PEM. For more information on how to configure Pixie's memory usage, see the [Tuning Memory Usage](/reference/admin/tuning-mem-usage/) page.
 
 ## Network Traffic