docs: updating installation guide with hardware reqs (cypress-io#4586)

Author: elylucas

content/guides/continuous-integration/introduction.md

@@ -243,7 +243,9 @@ maintained images and configurations on several CI providers.
 
 Hardware requirements to run Cypress depend how much memory the browser, the
 application under test, and the server (if running it locally) need to run the
-tests without crashing.
+tests without crashing. Visit our
+[System Requirements](/guides/getting-started/installing-cypress#System-requirements)
+guide for minimum hardware recommendations.
 
 **Some signs that your machine may not have enough CPU or memory to run
 Cypress:**

content/guides/getting-started/installing-cypress.md

@@ -132,25 +132,57 @@ everything you need prebuilt.
 
 ## System requirements
 
-<Alert type="info">
-
-#### Operating System
+### Operating System
 
 Cypress is a desktop application that is installed on your computer. The desktop
 application supports these operating systems:
 
 - **macOS** 10.9 and above _(Intel or Apple Silicon 64-bit (x64 or arm64))_
 - **Linux** Ubuntu 12.04 and above, Fedora 21 and Debian 8 _(x86_64 or Arm
-  64-bit (x64 or arm64))_
+  64-bit (x64 or arm64))_ (see [Linux Prerequisites](#Linux-Prerequisites) down
+  below)
 - **Windows** 7 and above _(64-bit only)_
 
-#### Node.js
+### Node.js
 
 If you're using `npm` to install Cypress, we support:
 
 - **Node.js** 12 or 14 and above
 
-#### Linux
+### Hardware
+
+When running Cypress locally, it should run comfortably on any machine that is
+capable of modern web development.
+
+When running Cypress in CI, however, some of the lower-tier configurations might
+not be able to run Cypress reliably, especially when recording videos or doing
+longer test runs.
+
+Some issues you might run into in CI that could be a sign of insufficient
+resources are:
+
+- Exiting early during `cypress run` or abruptly closing (“crashing”)
+- Frozen or missing frames in the video that is captured
+- Increased runtime
+
+When running Cypress in CI, we recommend that you have the following hardware
+requirements:
+
+#### CPU
+
+- 2 CPUs minimum to run Cypress
+- 1 additional CPU if video recording is enabled
+- 1 additional CPU per process you run outside of Cypress, such as:
+  - App server (frontend)
+  - App server (backend)
+  - App database
+  - Any additional infrastructure (Redis, Kafka, etc..)
+
+### Memory
+
+- 4GB minimum, 8GB+ for longer test runs
+
+### Linux Prerequisites
 
 If you're using Linux, you'll want to have the required dependencies installed
 on your system.
@@ -187,8 +219,6 @@ container with the Node.js process.
 
 **Great, now [install Cypress](#Installing)!**
 
-</Alert>
-
 ## Next Steps
 
 [Open the app](/guides/getting-started/opening-the-app) and take it for a test