ServantDocker doesn't work out of the box

[mac10688]

tldr;

1. The Dockerfile needs to inherit from haskell:8.6.3
2. The project name needs to be lowercased in several instances.

Steps to reproduce:

stack new ServantDockerTest servant-docker

sudo docker-compose up

1. "ERROR: no such image: ServantDockerTest: invalid reference format: repository name must be lowercase"

I go to docker-compose.yml and change line 3, 5, 15: to servantdockertest

version: '3'
services:
    servantdockertest:
        build: .
        image: servantdockertest
        command: ServantDockerTest
        expose:
            - "1234"
    nginx:
        build: ./nginx
        image: nginx
        ports:
            - "8080:80"
        depends_on:
            - servantdockertest

2. The build will fail because of ghc mismatch. To get past this, I update the docker image to haskell:8.6.3 or I have to go into the stack.yaml and change the resolver from lts-13.4 to lts-11.8

3. sudo docker-compose up will still fail because the upstream can't be found. Have to edit the nginx.conf file for the upstream app.

upstream app { server servantdockertest:1234; }

sudo docker-compose build
sudo docker-compose up

And everything works.