I have been going through and trying different method to build and deploy docker the image but no lock yet.

I tried building the docker image from as mention https://fusionauth.io/download with docker option.
For this test my dockerFile was

FROM debian:buster-slim
RUN apt-get update && apt-get install -y \
    curl \
    ca-certificates
RUN curl -o docker-compose.yml https://raw.githubusercontent.com/FusionAuth/fusionauth-containers/master/docker/fusionauth/docker-compose.yml && curl -o .env https://raw.githubusercontent.com/FusionAuth/fusionauth-containers/master/docker/fusionauth/.env && docker-compose up
 

Step 8/13 : RUN sh -c "curl -fsSL https://raw.githubusercontent.com/FusionAuth/fusionauth-install/master/install.sh | sh -s - -z"
 ---> Running in e3ad682f1af2
sh: 64: [[: not found
Illegal option -z
FusionAuth FastPath(tm) installer

Usage:
  ./install.sh [options]

OPTIONS:
  -s   Include the search engine with this install. Defaults to database search if this is not present.
  -h   Display this message.

Environment:
  TARGET_DIR  Choose a location to install to if using the zip. Defaults to $PWD/fusionauth.
  VERSION     Choose a version to install. Defaults to the latest stable version.
The command '/bin/sh -c sh -c "curl -fsSL https://raw.githubusercontent.com/FusionAuth/fusionauth-install/master/install.sh | sh -s - -z"' returned a non-zero code: 1

I also tried using the docker-compose as mentioned https://fusionauth.io/docs/v1/tech/installation-guide/docker just to mention Fly.oi only support docker image and we already have postgres deployed.

My docker-compose.yml looks

version: '3'

services:
  fusionauth:
    image: fusionauth/fusionauth-app:latest
    restart: unless-stopped
    ports:
      - 9011:9011
    volumes:
      - fa_config:/usr/local/fusionauth/config

volumes:
  db_data:
  fa_config:

I have also tried as shown below but am not sure the entry point or the path to run the app from the FusionAuth docker image.

the dockerfile

FROM  fusionauth/fusionauth-app:latest
FROM debian:buster-slim
RUN apt-get update && apt-get install -y \
    --no-install-recommends

RUN groupadd -g 999 appuser && \
    useradd -r -u 999 -g appuser appuser
WORKDIR /fusionauth
RUN chown appuser /fusion_auth
USER appuser
COPY . .
CMD ["what should be here  ? "]

So my question is how to deploy Fusionauth app using docker image?