Dockerfile

FROM jwilder/nginx-proxy

COPY *.conf /etc/nginx/conf.d/
COPY letsencrypt.diff /app/

RUN apt-get update && apt-get install -y \
    patch \
 && rm -rf /var/lib/apt/lists/*

RUN patch nginx.tmpl letsencrypt.diff

letsencrypt.diff

--- nginx.tmpl	2017-12-29 08:56:32.000000000 -0700
+++ nginx.tmpl	2017-12-29 08:56:32.000000000 -0700
@@ -193,7 +193,18 @@
 	listen [::]:80 {{ $default_server }};
 	{{ end }}
 	access_log /var/log/nginx/access.log vhost;
-	return 301 https://$host$request_uri;
+
+	location /.well-known/acme-challenge/ {
+	    auth_basic off;
+	    allow all;
+	    root /usr/share/nginx/html;
+	    try_files $uri =404;
+	    break;
+	}
+
+	location / {
+		return 301 https://$host$request_uri;
+	}
 }
 {{ end }}

I don't remember why I made this a gist, but I'm glad it helped somebody!

This worked for me too. Thanks! :)

I had to comment out the COPY *.conf /etc/nginx/conf.d/ line in the suggested Dockerfile and also decided to make a docker-compose.yml:

version: '3.7'

services:
  nginx_proxy:
    build: .
    container_name: nginx_proxy
    ports:
      - "80:80"
      - "443:443"
    restart: always
    environment:
      ENABLE_IPV6: 1
    volumes:
      - type: bind
        source: /var/run/docker.sock
        target: /tmp/docker.sock
      - type: bind
        source: /path/to/letsencrypt/certs
        target: /etc/nginx/certs
      - type: volume
        source: dhparam
        target: /etc/nginx/dhparam
      - type: bind
        source: /path/to/nginx/htpasswd
        target: /etc/nginx/htpasswd
      - type: bind
        source: /path/to/nginx/conf.d
        target: /etc/nginx/conf.d
      - type: bind
        source: /path/to/nginx/vhost.d
        target: /etc/nginx/vhost.d
      - type: bind
        source: /path/to/nginx/html
        target: /usr/share/nginx/html
    networks:
      - custom_bridge_network

volumes:
  dhparam:
    external:
      name: {enter volume ID of dhparam volume created by original nginx_proxy here}

networks:
  custom_bridge_network:
    external: true
    name: custom_bridge_network

Hope it helps anyone.

I made a PR to add this to jwilder/nginx-proxy: nginx-proxy/nginx-proxy#1338

PS @codekitchen You made it because of this: nginx-proxy/acme-companion#299