use non-relative path again

not great, but other things would need to change otherwise

docker/compose/mozdef_cognito_proxy/Dockerfile

@@ -1,6 +1,6 @@
 FROM openresty/openresty:centos
-ADD files/default.conf /etc/nginx/conf.d/default.conf
-ADD files/nginx.conf /usr/local/openresty/nginx/conf/nginx.conf
+ADD docker/compose/mozdef_cognito_proxy/files/default.conf /etc/nginx/conf.d/default.conf
+ADD docker/compose/mozdef_cognito_proxy/files/nginx.conf /usr/local/openresty/nginx/conf/nginx.conf
 RUN touch /etc/nginx/htpasswd
 RUN /usr/local/openresty/luajit/bin/luarocks install lua-resty-jwt
 RUN yum install -y httpd-tools && yum clean all