changes to docker-compose.yml to work with 1.17.1

[anewton1998]

Installing on Ubuntu, it comes with docker-compose 1.17.1.

I had to change my docker-compose.yml file to work with this version. It is below:

version: '3.3'

services:
  db:
    image: postgres
    restart: always
    environment:
      POSTGRES_USER: rrr
      POSTGRES_PASSWORD: rrr
      POSTGRES_DB: rrr
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U rrr"]
      interval: 5s
      timeout: 5s
      retries: 20
  lemmy:
    image: dessalines/lemmy:latest
    ports:
      - "8536:8536"
    environment:
      LEMMY_FRONT_END_DIR: /app/dist
      DATABASE_URL: postgres://rrr:rrr@db:5432/rrr
      JWT_SECRET: emdashg
      HOSTNAME: rrr
    restart: always
    depends_on: 
      - db 

[dessalines]

I can't use v3 cause it doesn't work with the health check: peter-evans/docker-compose-healthcheck#3 (comment)

What was the error with the other stuff? BTW I'm on docker-compose version 1.24.0

[anewton1998]

With the file as is, it claimed it didn't understand the service lemmy. When I changed the version to 3.3, it then said depends_on had to be an array.

As Ubuntu uses a down-level version of docker-compose, perhaps the thing to do is close this issue so others may find it (if they have the problem). I would assume manual install of a later version of docker-compose would work just fine. I know I've done that on other Ubuntu systems in the past.

[dessalines]

Ya dang, it looks like v2.4 requires at least docker 17.12.0. I'll add docker version requirements to the readme.