docs: document the dependency bootstrap

The page claimed the installer checks that docker, git and curl are present, which
undersold it now that it offers to install them, and the requirements page listed
Docker as optional without saying the Docker deployment needs nothing else on the
host.

Author: Swofty-Developments

website/docs/docker/setup.md

@@ -10,15 +10,29 @@ curl -fsSL skyblock-installer.swofty.net | bash
 
 This fetches the prebuilt `skyblock-installer` binary for your platform from the [latest release](https://github.com/Swofty-Developments/HypixelSkyBlock/releases/latest), caches it under `~/.cache/skyblock-installer`, and runs it. The installer will:
 
-1. Verify its dependencies are present (`docker`, `git`, `curl`)
+1. Check its dependencies (`docker`, `docker compose` v2, a reachable daemon, `git`, `curl`) and offer to install anything missing
 2. Run a system requirements check
 3. Let you pick which server types and services to run
 4. Generate all configuration and Docker Compose files
 5. Build and start everything in the correct order
 6. Drop you into a management dashboard
 
-:::alert note
-Requires **Docker** with **Compose v2** and a running Docker daemon your user can access. The installer itself is a self-contained Go binary — there are no other runtime dependencies to install.
+The installer itself is a self-contained Go binary with no runtime dependencies of its own.
+
+### Dependencies
+
+You do not need Docker installed beforehand. If anything is missing, the installer shows a **Missing dependencies** screen listing what is absent and the exact official commands for your distribution, and offers to run them for you:
+
+- `i` runs the commands (they use `sudo`, so you will be prompted for your password)
+- `r` re-checks once you have finished
+- `Esc` goes back if you would rather run them yourself
+
+You can reach the same screen any time from **Check dependencies** on the home menu.
+
+The commands come straight from the [official Docker install docs](https://docs.docker.com/engine/install/) and are picked per distribution — the apt repository steps on Debian and Ubuntu, the `dnf` repository steps on Fedora and RHEL, `pacman` on Arch, `zypper` on openSUSE. On macOS, Docker Desktop cannot be installed unattended, so the installer prints the `brew install --cask docker` steps instead of running them.
+
+:::alert warning
+Installing Docker adds your user to the `docker` group, and Linux only applies group membership at login. The installer will tell you to close your shell, open a new one, and run it again — this is expected and not a failure.
 :::
 
 ### What You'll See
@@ -27,6 +41,7 @@ The installer walks you through:
 
 | Step              | What It Does                                                              |
 |-------------------|---------------------------------------------------------------------------|
+| Dependencies      | Checks for Docker, Compose v2, git and curl, and offers to install them   |
 | System Check      | Validates RAM, CPU, disk space, Docker version                            |
 | Configuration     | Pick install directory, bind IP, online mode                              |
 | Server Selection  | Choose from 14 SkyBlock servers and 10 minigame servers                   |

website/docs/requirements.md

@@ -36,6 +36,8 @@ This project requires substantial resources to run properly. Make sure your syst
 | Docker | Containerized deployment | [Docker Desktop](https://www.docker.com/products/docker-desktop) |
 | MongoDB Compass | Database GUI | [MongoDB Compass](https://www.mongodb.com/products/compass) |
 
+If you use the Docker deployment, Java, MongoDB and Redis all run in containers, so Docker with Compose v2 is the only thing you need on the host. The [installer](/docs/docker/setup) checks for it and offers to install it for you if it is missing.
+
 ## Network Requirements
 
 The following ports are used by default: