unable to find tcp host for catalog.services

From the examples/nginx.md at https://github.com/hashicorp/consul-template/blob/master/examples/nginx.md using alpine version v0.22.0 (005b42eb)

I've given a custom host -consul-addr "consul:8500" but it's unable to reach

Screenshot: https://i.stack.imgur.com/1bQrb.png

### Configuration

```nginx.conf.ctmp
{{range services}} {{$name := .Name}} {{$service := service .Name}}
upstream {{$name}} {
zone upstream-{{$name}} 64k;
{{range $service}}server {{.Address}}:{{.Port}} max_fails=3 fail_timeout=60 weight=1;
{{else}}server 127.0.0.1:65535; # force a 502{{end}}
} {{end}}

server {
listen 80 default_server;

location / {
root /usr/share/nginx/html/;
index index.html;
}

location /stub_status {
stub_status;
}

{{range services}} {{$name := .Name}}
location /{{$name}} {
proxy_pass http://{{$name}};
}
{{end}}
}

```
## Dockerfile

```Dockerfile
FROM hashicorp/consul-template:alpine as template

COPY nginx.conf.ctmpl /tmp/nginx.conf.ctmpl

RUN consul-template -consul-addr "consul:8500" -template="/tmp/nginx.conf.ctmpl:/etc/nginx/conf.d/default.conf"

FROM nginx

COPY --from=template /etc/nginx/conf.d/default.conf /etc/nginx/conf.d/default.conf
```

## docker-compose

```docker-compose
version: '3'

services:

consul:
image: consul:1.6.1
container_name: consul
ports:
- 8300:8300
- 8400:8400
- 8500:8500

service:
container_name: service
build:
context: ./service
dockerfile: Dockerfile
ports:
- 8080:80
depends_on:
- consul

```

Start with examples/nginx.md, then inspect the Dockerfile and docker-compose configuration shown in the issue. Reproduce the consul-template invocation using -consul-addr "consul:8500" and check why the template cannot reach the catalog.services endpoint. Done means the example works with the stated Compose setup or the required configuration change is documented.

Written by the indexing model from the issue text.