I have 2 Windows Server Docker containers deployed with Docker Compose. One container runs a reverse proxy server and the other runs a web server. The web server serves a simple index.html page. Both are running Nginx.

When run, everything works as expected. I can access content via the proxy. But if I restart the web server I get a bad gateway error. I then need to restart the proxy to get it working again.

How do I get this working without the need to restart the proxy?

Docker-compose:

version: '3'

services: 
    web:
        build:
            context: ./web
            dockerfile: ./dockerfile
    proxy:
        build:
            context: ./proxy
            dockerfile: ./dockerfile
        ports:
            - "8089:80"

Proxy Dockerfile:

FROM sixeyed/nginx:windowsservercore

COPY nginx.conf C:/nginx/conf
CMD C:\nginx\nginx.exe

Proxy nginx.config:

events {
}
http {
    server {
        listen       80;
        server_name  localhost;

        location / {
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_pass http://web:80/;
        }
    }
}

Web Dockerfile:

FROM sixeyed/nginx:windowsservercore

COPY nginx.conf C:/nginx/conf
COPY index.html C:/nginx/html/index.html

CMD C:\nginx\nginx.exe

Web nginx.config:

events {
}

http {
    server {
        listen       80;
        server_name  localhost;

        location / {
            root   html;
            index  index.html index.htm;
        }
    }
}