feat: make http settings access_log_format and keepalive_timeout optional (#100)

Author: rolandjitsu

templates/nginx.conf.j2

@@ -68,9 +68,11 @@ http {
     {{ gzip(nginx_config_main_template.http_settings.gzip) }}
 {% endfilter %}
 {% endif %}
+{% if nginx_config_main_template.http_settings.access_log_format is defined %}
 {% for access_log in nginx_config_main_template.http_settings.access_log_format %}
     log_format  {{ access_log.name }}  {{ access_log.format }};
 {% endfor %}
+{% endif %}
 {% if nginx_config_main_template.http_settings.access_log_location is defined %}
 {% if nginx_config_main_template.http_settings.access_log_location is sameas false or nginx_config_main_template.http_settings.access_log_location == "off" %}
     access_log off;
@@ -92,7 +94,9 @@ http {
 {% if nginx_config_main_template.http_settings.server_tokens is defined and nginx_config_main_template.http_settings.server_tokens | length %}
     server_tokens {{ nginx_config_main_template.http_settings.server_tokens }};
 {% endif %}
+{% if nginx_config_main_template.http_settings.keepalive_timeout is defined %}
     keepalive_timeout  {{ nginx_config_main_template.http_settings.keepalive_timeout }};
+{% endif %}
 {% if nginx_config_main_template.http_settings.rate_limit is defined %}
     limit_req_zone $binary_remote_addr zone=mylimit:10m rate=10r/s;
 {% endif %}