feat: switch nginx container file to template to allow passing in dependent service

roles/nginx/templates/nginx.container.j2

@@ -0,0 +1,24 @@
+[Unit]
+Description=nginx container
+Requires={{ nginx_dependent_service }}.service
+After={{ nginx_dependent_service }}.service
+
+[Container]
+ContainerName=nginx
+Image=ghcr.io/nginxinc/nginx-unprivileged:mainline-alpine-slim
+PublishPort=80:8080
+PublishPort=443:8443
+Network=frontend.network
+Volume=/srv/nginx/nginx.conf:/etc/nginx/nginx.conf:ro
+Volume=/srv/nginx/conf.d:/etc/nginx/conf.d:ro
+Volume=/srv/certs:/etc/nginx/ssl:Z
+PodmanArgs=--runtime runsc --security-opt label:disable
+Label=disable
+AutoUpdate=registry
+
+[Install]
+WantedBy=multi-user.target default.target
+
+[Service]
+Restart=always
+