Configurar vários sites ou lojas

"http://{default}/":
    type: upstream
    upstream: "mymagento:http"

"http://<second-site>.{default}/":
    type: upstream
    upstream: "mymagento:http"

web:
    locations:
        "/": &app
            # The public directory of the app, relative to its root.
            root: "pub"
            passthru: "/index.php"
            index:
            - index.php
            ...

web:
    locations:
        "/": &app
            # The public directory of the app, relative to its root.
            root: "pub"
            passthru: "/index.php"
            index:
            - index.php
            ...
        "/media":
            root: "pub/media"
            ...
        "/static":
            root: "pub/static"
            allow: true
            scripts: false
            passthru: "/front-static.php"
            rules:
                ^/static/version\d+/(?<resource>.*)$:
                    passthru: "/static/$resource"
        "/<website>": *app
          ...

web:
    locations:
        "/": &root
            # The public directory of the app, relative to its root.
            root: "pub"
            passthru: "/index.php"
            index:
            - index.php
            ...
        "/static": &static
            root: "pub/static"

try {
    require __DIR__ . '/../../app/bootstrap.php';
} catch (\Exception $e) {

web:
    locations:
        "/": &root
            # The public directory of the app, relative to its root.
            root: "pub"
            passthru: "/index.php"
            index:
            - index.php
            ...
        "/media":
            root: "pub/media"
            ...
        "/static": &static
            root: "pub/static"
            allow: true
            scripts: false
            passthru: "/front-static.php"
            rules:
                ^/static/version\d+/(?<resource>.*)$:
                    passthru: "/static/$resource"
        "/<website>":
            <<: *root
            passthru: "<website>/index.php"
        "/<website>/static": *static
          ...

<?php
// enable, adjust and copy this code for each store you run
// Store #0, default one
//if (isHttpHost("example.com")) {
//    $_SERVER["MAGE_RUN_CODE"] = "default";
//    $_SERVER["MAGE_RUN_TYPE"] = "store";
//}
function isHttpHost($host)
{
    if (!isset($_SERVER['HTTP_HOST'])) {
        return false;
    }
    return $_SERVER['HTTP_HOST'] === $host;
}

<?php
// enable, adjust and copy this code for each store you run
// Store #0, default one

function isHttpHost($host)
{
    if (!isset($_SERVER['HTTP_HOST'])) {
        return false;
    }
    return $_SERVER['HTTP_HOST'] ===  $host;
}

if (isHttpHost("example.com")) {
    $_SERVER["MAGE_RUN_CODE"] = "default";
    $_SERVER["MAGE_RUN_TYPE"] = "store";
}

<?php
function isHttpHost($host)
{
    if (!isset($_SERVER['HTTP_HOST'])) {
    return false;
    }
    return $_SERVER['HTTP_HOST'] ===  $host;
}

if (isHttpHost("second.store.com")) {
    $_SERVER["MAGE_RUN_CODE"] = "<second-site>";
    $_SERVER["MAGE_RUN_TYPE"] = "website";
}elseif (isHttpHost("store.com")){
    $_SERVER["MAGE_RUN_CODE"] = "base";
    $_SERVER["MAGE_RUN_TYPE"] = "website";
}

<?php
function isHttpHost($host)
{
    if (!isset($_SERVER['HTTP_HOST'])) {
    return false;
    }
    return $_SERVER['HTTP_HOST'] ===  $host;
}

if (isHttpHost("store.com")) {
   $code = "base";
   $type = "website";

   $uri = explode('/', $_SERVER['REQUEST_URI']);
   if (isset($uri[1]) && $uri[1] == 'second') {
     $code = '<second-site>';
     $type = 'website';
   }
   $_SERVER["MAGE_RUN_CODE"] = $code;
   $_SERVER["MAGE_RUN_TYPE"] = $type;
}

git add -A && git commit -m "Implement multiple sites" && git push origin <branch-name>