Dokku - Attach existing app (managed via docker-compose for example)

attach-existing-app.sh

#!/bin/bash

# script from https://dokku.com/docs/networking/network/#routing-an-app-to-a-known-ipport-combination

# for a service listening on:
# - ip address: 127.0.0.1
# - port: $port

DOMAIN=yourdomain.com

read  -p "App name: " app
read  -p "port: " port
read  -p "subdomain: " subdomain

echo "binding dokku app '$app' from 127.0.0.1:$port to $subdomain.$DOMAIN"
read  -n 1 -p "Please verify and press enter" verify

# create the app
dokku apps:create $app

# add an extra host that maps host.docker.internal to the docker gateway
dokku docker-options:add $app deploy "--add-host=host.docker.internal:host-gateway"

# set the SERVICE_HOST to the mapped hostname
dokku config:set $app SERVICE_HOST=host.docker.internal

# set the SERVICE_PORT to the port combination for your app
dokku config:set $app SERVICE_PORT=$port

# set the domains desired
dokku domains:set $app $subdomain.$DOMAIN

# deploy the service-proxy image
dokku git:from-image $app dokku/service-proxy:latest

echo "please run:      dokku letsencrypt:enable $app"