I'm baffled by this problem. If I run this:
FROM jtreminio/php:8.1
RUN sed -i 's,^\(user \).*,\1'www\;',g' /etc/nginx/nginx.conf
I get this error:
#0 0.339 sed: can't read /etc/nginx/nginx.conf: No such file or directory
But the file is there, and if I run sed from bash or with docker run, it works:
$ docker run jtreminio/php-nginx:8.1 sed -i 's,^\(user \).*,\1'www\;',g' /etc/nginx/nginx.conf
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
97a971771a05 jtreminio/php-nginx:8.1 "sed -i 's,^\\(user \\…" 25 seconds ago Exited (0) 24 seconds ago gifted_nightingale
what gives?
UPDATE:
RUN cp /etc/nginx/nginx.conf /etc/nginx/nginx.conf.bak
this also fails. It really looks like the file's not there. I suppose it's dynamically generated at start up. I'll keep investigating.