Rails app with Postgres and Caddy on Hetzner VPS with Docker Compose

Caddyfile

{
	email my@email.com
}

my.host.com {
	encode zstd gzip
	log {
       	output stdout
	}


	reverse_proxy * {
		to rails-app:3000
        transport http {
            read_buffer 8192
		}
        header_up Access-Control-Allow-Origin *
        header_up Access-Control-Allow-Credentials true
        header_up Access-Control-Allow-Headers Cache-Control,Content-Type

	}

	header /assets/*.js {
		Content-Type "text/javascript; charset=utf-8"
	}

	header /assets/*.css {
		Content-Type "text/css; charset=utf-8"
	}


}

docker-compose.yaml

version: "3.9"
services:
  caddy:
    image: caddy:2.4.3-alpine
    restart: unless-stopped
    ports:
      - 443:443
      - 80:80
    volumes:
      - ${PWD}/caddy:/data
      - ${PWD}/Caddyfile:/etc/caddy/Caddyfile
  db:
    image: postgres:14.9
    restart: always
    environment:
      POSTGRES_PASSWORD: "zzz"
      POSTGRES_USER: "uuu"
      POSTGRES_DB: "mydb"
    volumes:
      - ./postgres-data:/var/lib/postgresql/data
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U mydb"]
      interval: 5s
      timeout: 5s
      retries: 5
  rails-app:
    image: my-image:latest
    privileged: true
    environment:
      RAILS_ENV: "production"
      DATABASE_URL: "postgres://uuu:zz@db/mydb?pool=5"
      SECRET_KEY_BASE: AAA
      RAILS_SERVE_STATIC_FILES: "true"
    depends_on:
      db:
        condition: service_healthy

Dockerfile

FROM ruby:3.1.4-slim

RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    libpq-dev \
    postgresql-client \
    git \
    nodejs npm \
  && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*

RUN npm install -g yarn
RUN gem update --system

# use a global path instead of vendor
ENV GEM_HOME="/usr/local/bundle"
ENV BUNDLE_PATH="$GEM_HOME"
ENV BUNDLE_SILENCE_ROOT_WARNING=1
ENV BUNDLE_APP_CONFIG="$GEM_HOME"
ENV PATH="$GEM_HOME/bin:$BUNDLE_PATH/gems/bin:${PATH}"

# make 'docker logs' work
ENV RAILS_LOG_TO_STDOUT=true
ENV RAILS_ENV=production
ENV RAILS_SERVE_STATIC_FILES=true


WORKDIR /usr/src/app

COPY Gemfile Gemfile
COPY Gemfile.lock Gemfile.lock

RUN bundle install --jobs 4 --without development test

COPY . .
RUN rm -f tmp/pids/server.pid

EXPOSE 3000

CMD ["./entrypoint.sh"]

entrypoint.sh

#! /bin/bash
rm -f tmp/pids/server.pid
./bin/rake db:migrate
./bin/rails s -b 0.0.0.0