docker-surfshark/docker-compose.yml

version: "2"

services: 
    surfshark:
        image: ilteoood/docker-surfshark
        container_name: surfshark
        environment: 
            - SURFSHARK_USER=YOUR_SURFSHARK_USER
            - SURFSHARK_PASSWORD=YOUR_SURFSHARK_PASSWORD
            - SURFSHARK_COUNTRY=it
            - SURFSHARK_CITY=mil
            - CONNECTION_TYPE=udp
            - LAN_NETWORK=192.168.0.0/24      #Optional - Used to access attached containers web ui
	- ENABLE_MASQUERADE=true       #Optional - Masquerade NAT allows you to translate multiple IP addresses to another single IP address. Usefull when using KASM Workspaces VPN Sidecar.
        cap_add: 
            - NET_ADMIN
        devices:
            - /dev/net/tun
        ports:
            - 9091:9091 #We open here the port for transmission, as this container will be the access point for the others
        restart: unless-stopped
        dns:
            - 1.1.1.1
    service_test:
        image: byrnedo/alpine-curl
        container_name: alpine
        command: -L 'https://ipinfo.io'
        depends_on: 
            - surfshark
        network_mode: service:surfshark
        restart: always
    transmission:
        image: linuxserver/transmission
        container_name: transmission
        environment:
            - PUID=1000
            - PGID=1000
            - TZ=Europe/Rome
        #ports:
            #- 9091:9091 needed to access transmission's GUI
        network_mode: service:surfshark
        restart: unless-stopped