Command not being executed

Hello, i'm trying to exec a command but it doesn't give me any output about the execution.

I'd try `exec php -v` or `exec php artisan about` and the output is the same.

Executing these commands inside the container runs normally.

Caddyfile:
```Caddyfile
{
{$CADDY_GLOBAL_OPTIONS}

frankenphp {
{$FRANKENPHP_CONFIG}
}

order php_server before file_server
order php before file_server

exec php artisan optimize
}

{$CADDY_EXTRA_CONFIG}

{$SERVER_NAME:localhost} {
root * public/
encode zstd br gzip

{$CADDY_SERVER_EXTRA_DIRECTIVES}

php_server
}
```

Output:
```LOG
frankenphp-1 | {"level":"info","ts":1724843562.6514235,"msg":"using config from file","file":"/etc/caddy/Caddyfile"}
frankenphp-1 | {"level":"info","ts":1724843562.6519766,"msg":"adapted config to JSON","adapter":"caddyfile"}
frankenphp-1 | {"level":"warn","ts":1724843562.6519816,"msg":"Caddyfile input is not formatted; run 'caddy fmt --overwrite' to fix inconsistencies","adapter":"caddyfile","file":"/etc/caddy/Caddyfile","line":14}
frankenphp-1 | {"level":"info","ts":1724843562.652385,"logger":"admin","msg":"admin endpoint started","address":"localhost:2019","enforce_origin":false,"origins":["//localhost:2019","//[::1]:2019","//127.0.0.1:2019"]}
frankenphp-1 | {"level":"warn","ts":1724843562.6524725,"logger":"http.auto_https","msg":"server is listening only on the HTTP port, so no automatic HTTPS will be applied to this server","server_name":"srv0","http_port":80}
frankenphp-1 | {"level":"info","ts":1724843562.6525922,"msg":"FrankenPHP started 🐘","php_version":"8.3.7"}
frankenphp-1 | {"level":"info","ts":1724843562.652677,"logger":"http.log","msg":"server running","name":"srv0","protocols":["h1","h2","h3"]}
frankenphp-1 | {"level":"info","ts":1724843562.6525931,"logger":"tls.cache.maintenance","msg":"started background certificate maintenance","cache":"0x40000e3100"}
frankenphp-1 | {"level":"info","ts":1724843562.652971,"msg":"autosaved config (load with --resume flag)","file":"/config/caddy/autosave.json"}
frankenphp-1 | {"level":"info","ts":1724843562.6529841,"msg":"serving initial configuration"}
frankenphp-1 | {"level":"info","ts":1724843562.6540203,"logger":"tls","msg":"cleaning storage unit","storage":"FileStorage:/data/caddy"}
frankenphp-1 | {"level":"info","ts":1724843562.6541,"logger":"tls","msg":"finished cleaning storage units"}
frankenphp-1 | {"level":"info","ts":1724843562.667389,"logger":"exec.exit","msg":"","command":["php"],"duration":0.014693252}
```

Running the command inside in the container

I do build frankenphp using the following dockerfile part:
```Dockerfile
FROM dunglas/frankenphp:latest-builder AS builder

# Copy xcaddy in the builder image
COPY --from=caddy:builder /usr/bin/xcaddy /usr/bin/xcaddy

# CGO must be enabled to build FrankenPHP
ENV CGO_ENABLED=1 XCADDY_SETCAP=1 XCADDY_GO_BUILD_FLAGS="-ldflags '-w -s'"
RUN xcaddy build \
--output /usr/local/bin/frankenphp \
--with github.com/dunglas/frankenphp=./ \
--with github.com/dunglas/frankenphp/caddy=./caddy/ \
--with github.com/dunglas/caddy-cbrotli \
--with github.com/abiosoft/caddy-exec

FROM dunglas/frankenphp:1.2.5-php8.3.10-bookworm as runner

COPY --from=builder /usr/local/bin/frankenphp /usr/local/bin/frankenphp
COPY Caddyfile /etc/caddy/Caddyfile