dockerは簡単に動いちゃった
podmanとdocker同じやともうてたけど

---
root@OpenWrt10:~# docker pull nginx
Using default tag: latest
latest: Pulling from library/nginx
d0061d6703dc: Pull complete
...
Status: Downloaded newer image for nginx:latest
docker.io/library/nginx:latest
root@OpenWrt10:~# docker run --name mynginx1 -p 10080:80 -d nginx
516eaab6a0ba0f2a1c1dbc3be5658f833d781c3ee2acd0c79ccaa1bf95f73d07
root@OpenWrt10:~# curl localhost:10080
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
html { color-scheme: light dark; }
body { width: 35em; margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif; }
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
...

root@OpenWrt10:~# free
total used free shared buff/cache available
Mem: 507576 79104 54436 1288 374036 373704
Swap: 0 0 0