docker-compose setup not running in ECS

Question

I'm getting exasperated with deploying my nginx/django/redis/postgres setup to ECS. I have a docker-compse setup that is working perfectly in development on my local machine. However, the containers in ECS immediately stop after starting the task. I would be so happy to find out what I'm doing wrong here. I assume it is the nginx config, but don't know. See my setup:

Dockerfiles

- web

FROM python:3
ENV PYTHONUNBUFFERED 1

# Initialize
RUN mkdir -p /data/web
WORKDIR /data/web
COPY requirements.txt /data/web/

# Setup
RUN pip install --upgrade pip
RUN pip install -r requirements.txt


# Prepare
COPY . /data/web/
EXPOSE 8000

- nginx

FROM nginx

RUN apt-get update && apt-get install openssl -y
RUN mkdir -p /etc/letsencrypt/archive/mydomain.org/
RUN mkdir -p /etc/letsencrypt/live/mydomain.org/

COPY letsencrypt /etc/letsencrypt/archive/mydomain.org/

RUN ln -s /etc/letsencrypt/archive/mydomain.org/cert1.pem /etc/letsencrypt/live/mydomain.org/cert.pem
RUN ln -s /etc/letsencrypt/archive/mydomain.org/chain1.pem /etc/letsencrypt/live/mydomain.org/chain.pem
RUN ln -s /etc/letsencrypt/archive/mydomain.org/fullchain1.pem /etc/letsencrypt/live/mydomain.org/fullchain.pem
RUN ln -s /etc/letsencrypt/archive/mydomain.org/privkey1.pem /etc/letsencrypt/live/mydomain.org/privkey.pem


RUN rm /etc/nginx/conf.d/default.conf

COPY conf /etc/nginx/conf.d/

redis and postgres come from offical images.

This is my docker-compose.yml file:

version: '2'
services:
  web:
    restart: always
    build: ./web/
    links:
      - postgres:postgres
      - redis:redis
    env_file:
      - db.env
      - web_prod.env
    command: gunicorn turtle.wsgi:application -w 2 -b :8000
    volumes:
      - /data/web
    depends_on:
      - postgres
      - redis

  nginx:
    restart: always
    build: ./nginx_prod/
    ports:
      - "80:80"
      - "443:443"
    volumes_from:
      - web
    volumes:
      - /var/log/nginx
    links:
      - web:web

  postgres:
    restart: always
    image: postgres:latest
    volumes:
      - /var/lib/postgresql/data
    env_file:
      - db.env
    expose:
      - "5432"

  redis:
    restart: always
    image: redis:latest
    expose:
      - "6379"

Thereby, I load some variables to share DB credentials and set some django setting values like DEBUG=0, SECRET_KEY etc.

This is my nginx config:

worker_processes 1;
pid /tmp/nginx.pid;

error_log /var/log/nginx/error.log;

events {
    worker_connections 1024;
    accept_mutex off;
}

http {
    include mime.types;
    default_type application/octet-stream;
    access_log /var/log/nginx/access.log;
    sendfile on;

    upstream web {
        server web:8000 fail_timeout=0;
    }

    server {
        listen 80 default_server;
        return 444;
    }

    server {
        listen 80;
        charset utf-8;

        server_name mydomain.org www.mydomain.org;
        return 301 https://$server_name$request_uri;
    }

    server {
        listen 443 ssl http2;
        server_name mydomain.org www.mydomain.org;
        keepalive_timeout 5;

        location / {
            try_files %uri @proxy_to_app;
        }

        location @proxy_to_app {
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Host $server_name;
            proxy_set_header Host $host;
            proxy_redirect off;
            proxy_pass http://web;
        }

        ssl_certificate /etc/letsencrypt/live/mydomain.org/fullchain.pem;
        ssl_certificate_key /etc/letsencrypt/live/mydomain.org/privkey.pem;
        ssl_protocols TLSv1.2 TLSv1.1 TLSv1;
        ssl_ciphers EECDH+AESGCM:EDH+AESGCM:EECDH:EDH:!MD5:!RC4:!LOW:!MEDIUM:!CAMELLIA:!ECDSA:!DES:!DSS:!3DES:!NULL;
        ssl_prefer_server_ciphers on;

        ssl_dhparam /etc/letsencrypt/archive/mydomain.org/dhparam4096.pem;
        ssl_ecdh_curve secp384r1;

        add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;

        ssl_stapling on;
        ssl_trusted_certificate /etc/letsencrypt/live/mydomain.org/chain.pem;
        ssl_stapling_verify on;

        ssl_session_timeout 10m;
        ssl_session_cache off;
        ssl_session_tickets on;
        ssl_session_ticket_key /etc/letsencrypt/archive/mydomain.org/nginx_ticketkey;
    }
}

Web container is crushing with following error message.

{"log":"[2017-08-29 17:16:59 +0000] [1] [INFO] Starting gunicorn 19.7.1\n","stream":"stderr","time":"2017-08-29T17:16:59.198605099Z"}
{"log":"[2017-08-29 17:16:59 +0000] [1] [INFO] Listening at: http://0.0.0.0:8000 (1)\n","stream":"stderr","time":"2017-08-29T17:16:59.199346576Z"}
{"log":"[2017-08-29 17:16:59 +0000] [1] [INFO] Using worker: sync\n","stream":"stderr","time":"2017-08-29T17:16:59.199357527Z"}
{"log":"[2017-08-29 17:16:59 +0000] [7] [INFO] Booting worker with pid: 7\n","stream":"stderr","time":"2017-08-29T17:16:59.202010346Z"}
{"log":"[2017-08-29 17:16:59 +0000] [8] [INFO] Booting worker with pid: 8\n","stream":"stderr","time":"2017-08-29T17:16:59.227037442Z"}
{"log":"[2017-08-29 17:16:59 +0000] [7] [ERROR] Exception in worker process\n","stream":"stderr","time":"2017-08-29T17:16:59.460028625Z"}
{"log":"Traceback (most recent call last):\n","stream":"stderr","time":"2017-08-29T17:16:59.460048425Z"}
{"log":"  File \"/usr/local/lib/python3.6/site-packages/gunicorn/arbiter.py\", line 578, in spawn_worker\n","stream":"stderr","time":"2017-08-29T17:16:59.460051755Z"}
{"log":"    worker.init_process()\n","stream":"stderr","time":"2017-08-29T17:16:59.460054822Z"}
{"log":"  File \"/usr/local/lib/python3.6/site-packages/gunicorn/workers/base.py\", line 126, in init_process\n","stream":"stderr","time":"2017-08-29T17:16:59.460057228Z"}
{"log":"    self.load_wsgi()\n","stream":"stderr","time":"2017-08-29T17:16:59.46005997Z"}
{"log":"  File \"/usr/local/lib/python3.6/site-packages/gunicorn/workers/base.py\", line 135, in load_wsgi\n","stream":"stderr","time":"2017-08-29T17:16:59.46006246Z"}
{"log":"    self.wsgi = self.app.wsgi()\n","stream":"stderr","time":"2017-08-29T17:16:59.46006513Z"}
{"log":"  File \"/usr/local/lib/python3.6/site-packages/gunicorn/app/base.py\", line 67, in wsgi\n","stream":"stderr","time":"2017-08-29T17:16:59.460067413Z"}
{"log":"    self.callable = self.load()\n","stream":"stderr","time":"2017-08-29T17:16:59.460069991Z"}
{"log":"  File \"/usr/local/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py\", line 65, in load\n","stream":"stderr","time":"2017-08-29T17:16:59.460072224Z"}
{"log":"    return self.load_wsgiapp()\n","stream":"stderr","time":"2017-08-29T17:16:59.46007479Z"}
{"log":"  File \"/usr/local/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py\", line 52, in load_wsgiapp\n","stream":"stderr","time":"2017-08-29T17:16:59.460077063Z"}
{"log":"    return util.import_app(self.app_uri)\n","stream":"stderr","time":"2017-08-29T17:16:59.460079605Z"}
{"log":"  File \"/usr/local/lib/python3.6/site-packages/gunicorn/util.py\", line 352, in import_app\n","stream":"stderr","time":"2017-08-29T17:16:59.460081902Z"}
{"log":"    __import__(module)\n","stream":"stderr","time":"2017-08-29T17:16:59.460084489Z"}
{"log":"ModuleNotFoundError: No module named 'turtle.wsgi'; 'turtle' is not a package\n","stream":"stderr","time":"2017-08-29T17:16:59.460086702Z"}
{"log":"[2017-08-29 17:16:59 +0000] [7] [INFO] Worker exiting (pid: 7)\n","stream":"stderr","time":"2017-08-29T17:16:59.460089174Z"}

Project Structure

web - app - static - staticfiles - turtle - __init__.py - settings.py - urls.py - wsgi.py - Dockerfile - manage.py