Add Transmission (#454)

* Added Transmission YML

* Create transmission.png

* Update transmission.yml

* Update transmission.yml

* Update transmission.yml

* run formatter

* Update transmission.yml

* Update transmission.yml

public/v4/apps/transmission.yml

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+captainVersion: 4
+services:
+    $$cap_appname:
+        image: ghcr.io/linuxserver/transmission:$$cap_transmission_version
+        environment:
+            PUID: '1000'
+            PGID: '1000'
+            TZ: $$cap_tz
+            TRANSMISSION_WEB_HOME: /$$cap_ui/
+            USER: $$cap_user
+            PASS: $$cap_pass
+            WHITELIST: '' #optional
+            HOST_WHITELIST: '' #optional
+            WEBUI_PORT: '9091'
+        ports:
+            - 51413:51413
+        hostname: $$cap_appname.$$cap_root_domain
+        volumes:
+            - $$cap_appname-config:/config
+            - $$cap_path_to_downloads:/downloads
+            - $$cap_appname-watch:/watch
+        caproverExtra:
+            containerHttpPort: '9091'
+caproverOneClickApp:
+    variables:
+        - id: $$cap_transmission_version
+          label: Transmission Version
+          defaultValue: arm64v8-version-3.00-r2
+          description: Check out their Docker page for the valid tags https://hub.docker.com/r/linuxserver/transmission/tags
+          validRegex: /^([^\s^\/])+$/
+        - id: $$cap_tz
+          label: Time Zone
+          defaultValue: Asia/Kolkata
+          description: Get yours from https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
+          validRegex: /.{1,}/
+        - id: $$cap_user
+          label: Username
+          defaultValue: admin
+        - id: $$cap_pass
+          label: Password
+          defaultValue: password
+        - id: $$cap_path_to_downloads
+          label: Path to downloads folder
+          defaultValue: transmission-downloads
+          description: Path to pictures folder where u want to save the downloaded torrents. You can mention an existing directory here too. Eg. /home/user/torrents/
+          validRegex: '/.{1,}/'
+        - id: $$cap_ui
+          label: User Interface
+          defaultValue: transmission-web-control
+          description: Specify an alternative UI options are combustion-release, transmission-web-control, kettu and flood-for-transmission.
+          validRegex: /^(combustion-release|transmission-web-control|kettu|flood-for-transmission)$/
+    instructions:
+        start: |-
+            Transmission is designed for easy, powerful use. Transmission has the features you want from a BitTorrent client: encryption, a web interface, peer exchange, magnet links, DHT, µTP, UPnP and NAT-PMP port forwarding, webseed support, watch directories, tracker editing, global and per-torrent speed limits, and more.
+            This app uses port 51413 as Torrent port, Always allow this port on your firewall.
+        end: |-
+            Transmission is deployed and available as $$cap_appname.$$cap_root_domain.
+            The default username/password is $$cap_user/$$cap_pass.
+            Change username/password via the webui in the webui section of settings or using enviornament variables.
+    displayName: Transmission
+    isOfficial: true
+    description: Transmission is a BitTorrent client which features a variety of user interfaces on top of a cross-platform back-end.
+    documentation: Taken from https://hub.docker.com/r/linuxserver/transmission.