docker-compose up fails for nginx container - docker

Question

I am getting the following error when I run docker-compose up:
backend_1_a5b5a2caf6fc | 2019/04/28 21:40:49 [emerg] 1#1: no "ssl_certificate" is defined for the "listen ... ssl" directive in /etc/nginx/conf.d/default.conf:4
backend_1_a5b5a2caf6fc | nginx: [emerg] no "ssl_certificate" is defined for the "listen ... ssl" directive in /etc/nginx/conf.d/default.conf:4
...
...
production_backend_1_a5b5a2caf6fc exited with code 1
Here is my Dockerfile for nginx:
FROM nginx
COPY nginx.conf /etc/nginx/conf.d/default.conf
default.conf:
fastcgi_cache_path /dev/shm levels=1:2 keys_zone=laravel:100m;
fastcgi_cache_key "$scheme$request_method$host$request_uri$query_string";
server {
listen 80 default_server;
root /var/www/public;
index index.php index.html;
client_max_body_size 5M;
...
...
docker-compose.yml:
version: '3'
services:
backend:
build: ./nginx
depends_on:
- db
- redis
working_dir: /var/www
volumes:
- ../../src:/var/www
ports:
- 80:80
...
...

Answer 1

This means that you have not setup ssl correctly (you're missing a server certificate). Since you have mapped port 80 and not 443 in your docker-compose i assume you're not going to use SSL.
Simply remove the following line in your nginx.conf to disable ssl:
listen 443 ssl http2;
be sure to rebuild and restart your nginx container.

Answer 2

Do you have any other server listening on port 443.Try to delete all symbolic links from /etc/nginx/sites-enabled except this one server you want to make work

Answer 3

But, if someone need to use SSL, this error means that your server section is missing ssl_certificate and ssl_certificate_key declarations. You need to have a .crt and a .key file to run with ssl.
It should looks like
server {
listen 80;
listen 443 default_server ssl;
ssl_certificate /etc/nginx/certs/default.crt;
ssl_certificate_key /etc/nginx/certs/default.key;
... other declarations
}