Download & Install

First — check the engine

docker info --format "{{.OSType}} {{.Architecture}}"

It must print linux x86_64. If it prints windows, Docker Desktop is in Windows-containers mode — switch with the tray icon's Switch to Linux containers…. If it errors, the engine is not running yet; wait for the whale icon to go steady. A docker load that waits a long time and then fails with an API error mentioning Linux images is this, not the bundle.

Step 2 — PowerShell

mkdir inwardis; cd inwardis
curl.exe -O https://inwardis.com/downloads/docker-compose.prod.yml

Spell out curl.exe: plain curl is an alias for Invoke-WebRequest, which has no -O.

Step 3 — PowerShell

$rng = [System.Security.Cryptography.RandomNumberGenerator]::Create()
$b = New-Object 'System.Byte[]' 16; $rng.GetBytes($b)
$pg  = ($b | ForEach-Object { $_.ToString('x2') }) -join ''
$b = New-Object 'System.Byte[]' 32; $rng.GetBytes($b)
$jwt = ($b | ForEach-Object { $_.ToString('x2') }) -join ''
$b = New-Object 'System.Byte[]' 24; $rng.GetBytes($b)
$key = [Convert]::ToBase64String($b)

@"
POSTGRES_PASSWORD=$pg
JWT_SECRET=$jwt
INWARDIS_ENCRYPTION_KEY=$key
INWARDIS_VERSION=<version>
"@ | Set-Content -Encoding ascii .env

-Encoding ascii is required, not cosmetic: PowerShell writes UTF-16 by default and Docker Compose reads that as binary, so the first variable silently goes missing. openssl is not on Windows, which is why the secrets come from RandomNumberGenerator — never Get-Random, which is not a cryptographic source.