client.json

{
    "run_type": "client",
    "local_addr": "127.0.0.1",
    "local_port": 1080,
    "remote_addr": "naphtali.tuppu.net",
    "remote_port": 443,
    "password": ["yourpassword"],
    "log_level": 1,
    "ssl": {
        "verify": true,
        "cert": "/path/to/cert",
        "verify_hostname": true,
        "cipher": "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-S
HA384:ECDHE-ECDSA-AES256-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES128-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA:AES128-SHA:AES256-SHA:DES-CBC3-SHA",
        "cipher_tls13": "TLS_AES_128_GCM_SHA256:TLS_CHACHA20_POLY1305_SHA256:TLS_AES_256_GCM_SHA384",
        "sni": "",
        "alpn": [
            "h2",
            "http/1.1"
        ],
        "reuse_session": true,
        "session_ticket": false,
        "curves": ""
    },
    "tcp": {
        "no_delay": true,
        "keep_alive": true,
        "reuse_port": false,
        "fast_open": false,
        "fast_open_qlen": 20
    }
}

naphtali.cert

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

After installing trojan, run trojan -c /path/to/client.json where client.json is above file, which you should download and put somewhere on your system.
Change the password to the one you're using for the Caonima's servers.
cert is the public certificate of naphtali.tuppu.net that you can retrieve with a python script. Here's another one.