Document new install options, update examples

docs/quick.md

@@ -11,22 +11,27 @@ The [Quick installer](https://github.com/RaspAP/raspap-webgui/blob/master/instal
 curl -sL https://install.raspap.com | bash -s -- --help
 ```
 
-Appending `-s -- [OPTION]` to the Quick Install directive will activate one or more options. These are described below.
+Appending `-s -- [option]` to the Quick Install directive will activate one or more options. Several options may be chained together to customize an installation. Examples are given below.
 
 ## Examples
 The installer may be invoked locally or remotely via `curl`. Examples with both cases and various options are given below.
 
 Invoke installer remotely, run non-interactively with option flags:
 ```
-curl -sL https://install.raspap.com | bash -s -- --yes --openvpn 1 --adblock 0
+curl -sL https://install.raspap.com | bash -s -- --yes --wireguard 1 --adblock 0
 ```
 
-Invoke remotely, uprgrade an existing install to the [:octicons-heart-fill-24:{: .heart }  Insiders Edition](insiders.md):
+Invoke remotely, uprgrade an existing install to the [:octicons-heart-fill-24:{: .heart }  Insiders Edition](insiders.md). The `--name` and `--token` arguments are optional; if they are not specified the user will be prompted to authenticate with GitHub:
 ```
-curl -sL https://install.raspap.com | bash -s -- --upgrade --insiders
+curl -sL https://install.raspap.com | bash -s -- --upgrade --insiders --name <name> --token <token>
 ```
 
-Run locally specifying GitHub repo and branch:
+Invoke remotely, perform an unattended update to the latest release version:
+```
+curl -sL https://install.raspap.com | bash -s -- --yes --update --path /var/www/html
+```
+
+Run locally specifying a GitHub repo and branch:
 ```
 raspbian.sh --repo foo/bar --branch my/branch
 ```
@@ -41,6 +46,9 @@ raspbian.sh --version
 #### -y, --yes, --assume-yes
 This option enables unattended installations, such that the installer assumes "yes" as an answer to all user prompts. This behavior is identical to how the same option with the `apt-get` package handler works. 
 
+#### -c, --cert, --certificate
+This option installs an SSL certificate with `mkcert` and configures lighttpd for HTTPS support. It does _not_ (re)install RaspAP. Details are [provided here](ssl.md).
+
 #### -o, --openvpn `<flag>`
 Used with the `-y`, `--yes` option above, this sets the OpenVPN install option (`0` = don't install OpenVPN). Given that OpenVPN support is an optional extra, this enables an unattended setup without installing it.
 
@@ -50,28 +58,44 @@ Used with the `-y`, `--yes` option above, this sets the Ad Blocking install opti
 #### -w, --wireguard `<flag>`
 Used with the `-y`, `--yes` option above, this sets the WireGuard install option (`0` = don't install WireGuard). Given that WireGuard support is an optional extra, this enables an unattended setup without installing it.
 
-#### -c, --cert, --certificate
-This option installs an SSL certificate with `mkcert` and configures lighttpd for HTTPS support. It does _not_ (re)install RaspAP. Details are [provided here](ssl.md).
-
 #### -r, --repo, --repository `<name>`
 If you have forked this project to your own GitHub repo, this option lets you override the default GitHub repo (`RaspAP/raspap-webgui`) used to install RaspAP. An alternate repository name is a required parameter.
 
 #### -b, --branch `<name>`
 Similarly, this option overrides the default git branch. This is useful if you have created a feature branch (`my-feature`) and wish to perform an installation using the Quick Installer. An alternate branch name is a required parameter.
 
-An example combining the `repo` and `branch` options is given below:
+An example combining the `-r`, `--repo` and `-b`, `--branch` options is given below:
 ```
 curl -sL https://install.raspap.com | bash -s -- --repo foo/bar --branch my-feature
 ```
 
 #### -t, --token `<accesstoken>`
-Specify a [GitHub token](https://docs.github.com/en/github/authenticating-to-github/creating-a-personal-access-token) to access a private repository.
+Specify a GitHub [personal access token](https://docs.github.com/en/authentication/) to authenticate with a private repository. Used together with the `-n`, `--name` option (below).
+
+#### -n, --name `<username>`
+Specify a GitHub username to access a private repository. An example combining the `--token` and `--name` options is given below:
+
+```
+curl -sL https://install.raspap.com | bash -s -- --name billz --token [my-token]
+```
 
 #### -u, --upgrade
-Upgrades an existing installation to the latest release version.
+Upgrades an existing RaspAP installation to the latest release version.
+
+#### -d, --update
+Performs a minimal update of an existing installation to the [latest release version](https://github.com/RaspAP/raspap-webgui/releases). This differs from the `-u`, `--upgrade` option in several ways. The user is not prompted to install optional RaspAP components, and several steps used for an initial installation are not performed. Existing configuration files remain intact.
+
+#### -p, --path
+Sets the application path for an existing RaspAP installation. 
+
+It may be combined with the `-d`, `--update` and `-y`, `--yes` options to perform an unattended update. An example is given below:
+
+```
+curl -sL https://install.raspap.com | bash -s -- --update --path /var/www/html --yes
+```
 
 #### -i, --insiders
-Installs from the [Insiders Edition](insiders.md) (`RaspAP/raspap-insiders`)
+Installs from the [:octicons-heart-fill-24:{: .heart }  Insiders Edition](insiders.md) (`RaspAP/raspap-insiders`).
 
 #### -m, --minwrite
 Configures a microSD card for [minimum write operation](minwrite.md).