feat: add webtop (#729)

* feat: add webtop

* feat: add webtop logo

* fix: use explicit version

public/v4/apps/webtop.yml

@@ -0,0 +1,59 @@
+captainVersion: 4
+services:
+    $$cap_appname:
+        image: lscr.io/linuxserver/webtop:$$cap_webtop_version
+        hostname: $$cap_appname.$$cap_root_domain
+        environment:
+            TZ: $$cap_webtop_timezone
+            PUID: $$cap_webtop_user_id
+            PGID: $$cap_webtop_group_id
+            KEYBOARD: $$cap_webtop_keyboard_layout
+            AUTO_LOGIN: $$cap_webtop_auto_login
+        volumes:
+            - $$cap_appname-config:/config
+        caproverExtra:
+            containerHttpPort: 3000
+caproverOneClickApp:
+    displayName: Webtop
+    description: Linux in a web browser supporting popular desktop environments.
+    isOfficial: true
+    documentation: See https://docs.linuxserver.io/images/docker-webtop
+    instructions:
+        start: |-
+            Alpine, Ubuntu, Fedora, and Arch based containers containing full desktop environments in officially supported flavors accessible via any modern web browser.
+            Please note, that the Docker socket is not mounted and that hardware acceleration is disabled.
+        end: >
+            Webtop has been successfully deployed! It might take few moments before it's fully started.
+            Please turn on "Websocket Support" in the settings.
+            You can access it at http://$$cap_appname.$$cap_root_domain with default login abc/abc
+    variables:
+        - id: $$cap_webtop_version
+          label: Version Tag
+          description: Check out their documentation for the valid tags https://docs.linuxserver.io/images/docker-webtop#version-tags
+          defaultValue: ubuntu-xfce-version-85c6c96d
+          validRegex: "/^([^\\s^\\/])+$/"
+        - id: $$cap_webtop_timezone
+          label: Timezone
+          description: Timezone for the application, find yours at https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
+          defaultValue: UTC
+          validRegex: /.{1,}/
+        - id: $$cap_webtop_user_id
+          label: User ID
+          defaultValue: '1000'
+          description: User ID that the process uses, run (id $user) on your instance to see the ID
+          validRegex: /.{1,}/
+        - id: $$cap_webtop_group_id
+          label: Group ID
+          defaultValue: '1000'
+          description: Group ID that the process uses, run (id $user) on your instance to see the ID
+          validRegex: /.{1,}/
+        - id: $$cap_webtop_keyboard_layout
+          label: Keyboard Layout
+          description: Keyboard layout for use (e.g. "en-us-qwerty" for US or "de-de-qwertz" for German), see available layouts at https://docs.linuxserver.io/images/docker-webtop#application-setup
+          defaultValue: en-us-qwerty
+          validRegex: "/^([^\\s^\\/])+$/"
+        - id: $$cap_webtop_auto_login
+          label: Force Login
+          defaultValue: 'true'
+          description: If you change your password or want to login manually to the GUI set this to "false"
+          validRegex: /^(true|false)$/