Все Docker штуки опущены в директорию docker.

Production Docker контейнер теперь использует alpine linux вместо пустого scratch
В production Docker контейнер добавлен docker-entrypoint.sh, который автоматически создаёт конфиг по умолчанию.

docker/Dockerfile

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+FROM alpine:3.6
+
+COPY docker/docker-entrypoint.sh /usr/local/bin/
+COPY docker/config.dist.yml /usr/local/etc/minecraft-skinsystem/
+
+COPY minecraft-skinsystem /usr/local/bin/
+
+ENTRYPOINT ["docker-entrypoint.sh"]
+CMD ["serve"]

docker/config.dist.yml

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+# Main server configuration. Actually you don't want to change it,
+# but you able to change host or port, that will be used by serve command
+server:
+  host: # leave host empty to allow Docker publish port
+  port: 80
+
+# Worker listen to AMQP events, so it should know how to connect to any
+# AMQP provider (actually RabbitMQ). You should not escape any vhost
+# characters, 'cause it will be done by application automatically
+amqp:
+  host: rabbitmq
+  port: 5672
+  username: minecraft-skinsystem-app
+  password: minecraft-skinsystem-app-password
+  vhost: /
+
+# Both of web or worker depends on storage.
+storage:
+  # For now app require Redis and don't support any other backends to store
+  # skins, but in the future we can have more backends. Poll size tune amount
+  # of connections to the redis. It's not recommended to set it less then 2
+  # because it will lead to panic on high load.
+  redis:
+    host: redis
+    port: 6379
+    poolSize: 10
+
+  # Filesystem storage used to store capes. basePath specify absolute or relative
+  # path to storage and capesDirName specify which folder in this base path will
+  # be used to search capes.
+  filesystem:
+    basePath: /data
+    capesDirName: capes
+
+# Accounts Ely.by internal API will be used in cases, when by some reasons
+# information about user will be unavailable in the app storage.
+api:
+  accounts:
+    host: https://account.ely.by
+    id: app-id
+    secret: secret
+    scopes:
+      - internal_account_info
+
+# StatsD can be used to collect metrics
+# statsd:
+#   addr: localhost:3746
+
+# Sentry can be used to collect app errors
+# sentry:
+#   dsn: https://public:private@your.sentry.io/1

docker/docker-compose.dev.yml

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+# This compose file contains necessary docker-compose config to quick start
+# services required by app. Ports published to host.
+#
+# Usage:
+# 1. Clone this file as docker-compose.yml:
+#    cp docker/docker-compose.dev.yml docker-compose.yml
+#
+# 2. If necessary, then you can fix configuration to your environment.
+#    Then start all services:
+#    docker-compose up -d
+#
+# 3. Pass to the project configuration links to this services:
+#    amqp:
+#      host: localhost
+#      port: 5672
+#      username: ely
+#      password: ely
+#      vhost: /ely
+#
+#    storage:
+#      redis:
+#        host: localhost
+#        port: 6379
+#        poolSize: 10
+#
+# 4. After job is done all services can be stopped:
+#    docker-compose stop
+
+version: '2'
+services:
+  redis:
+    image: redis:3.2-32bit
+    ports:
+      - "6379:6379"
+    volumes:
+      - ./data/redis:/data
+
+  rabbitmq:
+    image: rabbitmq:3.6-management-alpine
+    ports:
+      - "5672:5672"
+      - "15672:15672"
+    environment:
+      RABBITMQ_DEFAULT_USER: "ely"
+      RABBITMQ_DEFAULT_PASS: "ely"
+      RABBITMQ_DEFAULT_VHOST: "/ely"

docker/docker-compose.prod.yml

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+version: '2'
+services:
+  web:
+    image: registry.ely.by/elyby/skinsystem:latest
+    restart: always
+    ports:
+      - "80:80"
+    links:
+      - redis
+    volumes:
+      - ./data/capes:/data/capes
+      - ./config/minecraft-skinsystem:/etc/minecraft-skinsystem
+
+  worker:
+    image: registry.ely.by/elyby/skinsystem:latest
+    restart: always
+    links:
+      - redis
+      - rabbitmq
+    command: ["amqp-worker"]
+
+  redis:
+    image: redis:3.2-32bit # 32-bit version used to decrease memory usage
+    restart: always
+    volumes:
+      - ./data/redis:/data
+
+  rabbitmq:
+    image: rabbitmq:3.6-alpine
+    restart: always
+    environment:
+      RABBITMQ_DEFAULT_USER: minecraft-skinsystem-app
+      RABBITMQ_DEFAULT_PASS: minecraft-skinsystem-app-password
+      RABBITMQ_DEFAULT_VHOST: /

docker/docker-entrypoint.sh

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+#!/bin/sh
+set -e
+
+CONFIG="/etc/minecraft-skinsystem/config.yml"
+
+if [ ! -f "$CONFIG" ]; then
+    mkdir -p $(dirname "${CONFIG}")
+    cp /usr/local/etc/minecraft-skinsystem/config.dist.yml "$CONFIG"
+fi
+
+if [ "$1" = "serve" ] || [ "$1" = "amqp-worker" ]; then
+    set -- minecraft-skinsystem "$@"
+fi
+
+exec "$@"