[New App] Threadfin (#308)

### App Information

Name: Threadfin
Short Description: M3U Proxy for Plex DVR and Emby/Jellyfin Live TV.
Based on xTeVe
Official Website: https://github.com/Threadfin/Threadfin
Docker Image: https://hub.docker.com/r/fyb3roptik/threadfin

Closes #210

Apps/Threadfin/docker-compose.yml

@@ -0,0 +1,56 @@
+name: threadfin
+services:
+  threadfin:
+    image: fyb3roptik/threadfin:latest
+    restart: unless-stopped
+    x-casaos:
+      volumes:
+        - container: /home/threadfin/conf/data
+          description:
+            en_us: Data
+        - container: /home/threadfin/conf/backup
+          description:
+            en_us: Backup
+      envs:
+        - container: THREADFIN_BRANCH
+          description:
+            en_us: "Set Threadfin git branch [ main, beta, dev ] Default: beta"
+        - container: THREADFIN_DEBUG
+          description:
+            en_us: "Set Threadfin debug level [ 0-3 ] Default: 0=OFF"
+      ports:
+        - container: "34400"
+          description:
+            en_us: Port to access the application's GUI via the web interface.
+    environment:
+      - THREADFIN_BRANCH=$THREADFIN_BRANCH
+      - THREADFIN_DEBUG=$THREADFIN_DEBUG
+    ports:
+      - target: 34400
+        published: "34400"
+        protocol: tcp
+    volumes:
+      - type: bind
+        source: /DATA/AppData/threadfin/config
+        target: /home/threadfin/conf/data
+      - type: bind
+        source: /DATA/AppData/threadfin/backup
+        target: /home/threadfin/conf/backup
+    container_name: threadfin
+x-casaos:
+  architectures:
+    - amd64
+    - arm64
+  main: threadfin
+  description:
+    en_us: M3U Proxy for Plex DVR and Emby/Jellyfin Live TV. Based on xTeVe.
+  developer: jdownloader
+  icon: https://cdn.jsdelivr.net/gh/IceWhaleTech/CasaOS-AppStore@main/Apps/Threadfin/icon.png
+  author: Fabio Tea
+  category: Utility
+  index: /web/
+  port_map: "34400"
+  scheme: http
+  store_app_id: threadfin
+  title:
+    en_us: Threadfin