nginx

The problem can be solved by using a Nginx reverse proxy. Each application will be exposed through a corresponding sub-domain.

Dockerfile:

FROM nginx:alpine
COPY nginx.conf /etc/nginx/conf.d/default.conf
COPY proxy.conf /etc/nginx/includes/proxy.conf


proxy.conf:

proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_buffering off;
proxy_request_buffering off;
proxy_http_version 1.1;
proxy_intercept_errors off;


nginx.conf:

# pm config.
server {
listen 80;
server_name site1.myproject.com;
location / {
include /etc/nginx/includes/proxy.conf;
proxy_pass http://site1_webserver_1;
}
access_log off;
error_log /var/log/nginx/error.log error;
}
# api config.
server {
listen 80;
server_name site1.myproject.com;
location / {
include /etc/nginx/includes/proxy.conf;
proxy_pass http://site2_webserver_1;
}
access_log off;
error_log /var/log/nginx/error.log error;
}
# Default
server {
listen 80 default_server;
server_name _;
root /var/www/html;
charset UTF-8;
access_log off;
log_not_found off;
error_log /var/log/nginx/error.log error;
}


The proxy_pass is the name of the application's docker container.