Local dns with wild wildcard dns entries

dnsmasq.conf

# explicitly define host-ip mappings
address=/localhost.localstack.cloud/172.16.1.252
# dnsmasq entries are always wildcard entries, so this maps both myapp.local and *.myapp.local

# (yes, it's fine for this to be your entire dnsmasq config. the defaults are pretty sensible)

localstack-dns-clientapp-docker-compose-v3.yaml

version: '3.3'
networks:
  default:
    ipam:
      config:
        - subnet:   172.16.0.0/23 # In order to specify static IPs, we must explicitly declare subnet.
          #ip_range: 172.16.0.0/24 # Range for dynamic IPs. We'll make sure to assign static IPs outside this range.
          # docs: https://docs.docker.com/compose/compose-file/compose-file-v2/#ipam
          # As of this writing, `ip_range` is not supported in v3, thus we will explictly specify IP
services:
    dnsmasq:
        image: strm/dnsmasq
        volumes:
            - './dnsmasq.conf:/etc/dnsmasq.conf' #this file has wildcard dns entries for localstack
        ports:
            - 53:53/udp
        cap_add:
            - NET_ADMIN
            # dnsmasq container config above is taken verbatim from https://hub.docker.com/r/strm/dnsmasq
        networks:
            default:
                ipv4_address: 172.16.1.253 # Static IP here makes it possible in docker comspose v3 to point other containers' dns here.
    localstack:
        environment:
            - TEST_AWS_ACCOUNT_ID=000000000000
            - DEFAULT_REGION=us-east-1
            - 'DOCKER_HOST=unix:///var/run/docker.sock'
            - HOSTNAME_EXTERNAL=localstack
            - HOSTNAME=localstack
        privileged: true
        container_name: localstack-plat
        ports:
            - '127.0.0.1:4566:4566'
            - '127.0.0.1:4571:4571'
        volumes:
            - '/var/run/docker.sock:/var/run/docker.sock'
            - 'C:\\tmp:/tmp/localstack'
        image: localstack/localstack:0.14.2
        networks:
          default:
            ipv4_address: 172.16.1.252 # Static IP here makes dnsmasq config easy to write and compatible with v3 as v3 dont have range
    myclientapp_consuming_localstack:
        ports:
            - '5030:80'
            - '5031:443'
        container_name: testapp
        volumes:
            - '/var/run/docker.sock:/var/run/docker.sock'
        image: #your-docker-image-goes-here , considering u have put service url for s3 as http://s3.localhost.localstack.cloud:4566
        dns:
            - 172.16.1.253 # dnsmasq container