docs(readme): Add installation section

README.md

@@ -4,3 +4,83 @@
 [![Go Report Card](https://goreportcard.com/badge/github.com/gabe565/cli-of-life)](https://goreportcard.com/report/github.com/gabe565/cli-of-life)
 
 Run Conway's Game of Life in your terminal!
+
+## Installation
+
+### APT (Ubuntu, Debian)
+
+<details>
+  <summary>Click to expand</summary>
+
+1. If you don't have it already, install the `ca-certificates` package
+   ```shell
+   sudo apt install ca-certificates
+   ```
+
+2. Add gabe565 apt repository
+   ```
+   echo 'deb [trusted=yes] https://apt.gabe565.com /' | sudo tee /etc/apt/sources.list.d/gabe565.list
+   ```
+
+3. Update apt repositories
+   ```shell
+   sudo apt update
+   ```
+
+4. Install cli-of-life
+   ```shell
+   sudo apt install cli-of-life
+   ```
+</details>
+
+### RPM (CentOS, RHEL)
+
+<details>
+  <summary>Click to expand</summary>
+
+1. If you don't have it already, install the `ca-certificates` package
+   ```shell
+   sudo dnf install ca-certificates
+   ```
+
+2. Add gabe565 rpm repository to `/etc/yum.repos.d/gabe565.repo`
+   ```ini
+   [gabe565]
+   name=gabe565
+   baseurl=https://rpm.gabe565.com
+   enabled=1
+   gpgcheck=0
+   ```
+
+3. Install cli-of-life
+   ```shell
+   sudo dnf install cli-of-life
+   ```
+</details>
+
+### AUR (Arch Linux)
+
+<details>
+  <summary>Click to expand</summary>
+
+Install [cli-of-life-bin](https://aur.archlinux.org/packages/cli-of-life-bin) with your [AUR helper](https://wiki.archlinux.org/index.php/AUR_helpers) of choice.
+</details>
+
+### Homebrew (macOS, Linux)
+
+<details>
+  <summary>Click to expand</summary>
+
+Install cli-of-life from [gabe565/homebrew-tap](https://github.com/gabe565/homebrew-tap):
+```shell
+brew install gabe565/tap/cli-of-life
+```
+</details>
+
+### Manual Installation
+
+<details>
+  <summary>Click to expand</summary>
+
+Download and run the [latest release binary](https://github.com/gabe565/cli-of-life/releases/latest) for your system and architecture.
+</details>