docker-compose.yml

version: '3.7'
services:
  proxy:
    image: traefik:v2.1
    container_name: traefik
    restart: unless-stopped
    security_opt:
      - no-new-privileges:true
    networks:
      - proxy-network
    ports:
      - 80:80
      - 443:443
    volumes:
      - /etc/localtime:/etc/localtime:ro
      - /var/run/docker.sock:/var/run/docker.sock:ro
      - ./docker/traefik.yml:/traefik.yml:ro
      - ./docker/acme.json:/acme.json
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.traefik.entrypoints=http"
      - "traefik.http.routers.traefik.rule=Host(`proxy.objectaaron.com`)"
      - "traefik.http.middlewares.traefik-auth.basicauth.users=admin:$apr1$se9V4kJV$WK3Tl27Rf1UKJs1JkOXQQ1"
      - "traefik.http.middlewares.traefik-https-redirect.redirectscheme.scheme=https"
      - "traefik.http.routers.traefik.middlewares=traefik-https-redirect"
      - "traefik.http.routers.traefik-secure.entrypoints=https"
      - "traefik.http.routers.traefik-secure.rule=Host(`proxy.objectaaron.com`)"
      - "traefik.http.routers.traefik-secure.middlewares=traefik-auth"
      - "traefik.http.routers.traefik-secure.tls=true"
      - "traefik.http.routers.traefik-secure.tls.certresolver=http"
      - "traefik.http.routers.traefik-secure.service=api@internal"

  postgres:
    image: postgres:12.1-alpine
    environment:
      POSTGRES_DB: ${FW_DATABASE_NAME?Variable FW_DATABASE_NAME not set}
      POSTGRES_PASSWORD: ${FW_DATABASE_PASSWORD?Variable FW_DATABASE_PASSWORD not set}
      POSTGRES_USER: ${FW_DATABASE_USERNAME?Variable FW_DATABASE_USERNAME not set}
    networks:
      - db-network
    volumes:
      - database-storage:/var/lib/postgresql/data

  faithful_word_umbrella:
    container_name: faithful_word_umbrella
    restart: unless-stopped
    build: .
    image: faithful_word_umbrella
    ports:
      - '4000:4000'
    env_file:
      - .faithful_word_umbrella_env
    depends_on:
      - proxy
      - postgres
    networks:
      - db-network
      - proxy-network
    labels:
      - "traefik.enable=true"
      - "traefik.port=4000"
      - "traefik.http.routers.faithful_word_umbrella.entrypoints=http"
      - "traefik.http.routers.faithful_word_umbrella.rule=Host(`${DOMAIN?Variable DOMAIN not set}`)"
      - "traefik.http.middlewares.faithful_word_umbrella-https-redirect.redirectscheme.scheme=https"
      - "traefik.http.routers.faithful_word_umbrella.middlewares=faithful_word_umbrella-https-redirect"
      - "traefik.http.routers.faithful_word_umbrella-secure.entrypoints=https"
      - "traefik.http.routers.faithful_word_umbrella-secure.rule=Host(`${DOMAIN?Variable DOMAIN not set}`)"
      - "traefik.http.routers.faithful_word_umbrella-secure.tls=true"
      - "traefik.http.routers.faithful_word_umbrella-secure.tls.certresolver=http"
      - "traefik.http.routers.faithful_word_umbrella-secure.service=faithful_word_umbrella"
      - "traefik.http.services.faithful_word_umbrella.loadbalancer.server.port=4000"
      - "traefik.docker.network=proxy-network"
networks:
  db-network:
  proxy-network:
    external: true

volumes:
  proxy-certificates-storage:
  database-storage:

traefik                   | 2020/01/27 01:53:36 command traefik error: yaml: line 3: did not find expected key
traefik exited with code 1
traefik                   | 2020/01/27 01:53:42 command traefik error: yaml: line 3: did not find expected key
traefik exited with code 1
traefik                   | 2020/01/27 01:53:50 command traefik error: yaml: line 3: did not find expected key
traefik exited with code 1

Your error is in ./docker/traefik.yml, not in the compose file. Basically, the services start just fine and traefik then can't parse the file.