feat : Define Dockerfile & Docker Compose

- Dockerfile 내에서 `.env`을 복사하는 과정이 있기 때문에 `.dockerignore`에서 `.env*`를 제외했습니다.

Author: yummygyudon

.dockerignore

@@ -0,0 +1,40 @@
+# See https://docs.docker.com/engine/reference/builder/#dockerignore-file for more about ignoring files.
+
+# Ignore git directory.
+/.git/
+/.gitignore
+/.gitattributes
+
+# Ignore bundler config.
+/.bundle
+
+# Ignore lint config
+/.rubocop.yml
+
+# Ignore all logfiles and tempfiles.
+/log/*
+/tmp/*
+!/log/.keep
+!/tmp/.keep
+
+# Ignore pidfiles, but keep the directory.
+/tmp/pids/*
+!/tmp/pids/.keep
+
+# Ignore storage (uploaded files in development and any SQLite databases).
+/storage/*
+!/storage/.keep
+/tmp/storage/*
+!/tmp/storage/.keep
+
+# Ignore CI service files.
+/.github
+
+# Ignore development files
+/.devcontainer
+
+# Ignore Docker-related files
+/.dockerignore
+/Dockerfile*
+
+README.md

Dockerfile

@@ -0,0 +1,23 @@
+ARG RUBY_VERSION=3.2.2
+FROM docker.io/library/ruby:$RUBY_VERSION-slim AS base
+
+ARG ENV_FILE_PATH=.env
+COPY $ENV_FILE_PATH .env
+
+WORKDIR /app
+
+COPY . /app
+
+RUN apt-get update -qq && \
+    apt-get install --no-install-recommends -y curl libjemalloc2 libvips postgresql-client && \
+    rm -rf /var/lib/apt/lists /var/cache/apt/archives
+
+RUN apt-get update -qq && \
+    apt-get install --no-install-recommends -y build-essential git libpq-dev pkg-config && \
+    rm -rf /var/lib/apt/lists /var/cache/apt/archives
+
+COPY Gemfile Gemfile.lock ./
+RUN bundle install
+
+EXPOSE 8080
+CMD ["dotenv", "rails", "s", "-p", "8080"]

docker-compose.yml

@@ -0,0 +1,35 @@
+version: '3.8'
+
+services:
+  db:
+    image: postgres:latest
+    container_name: app-db
+    restart: always
+    ports:
+      - "5432:5432"
+    environment:
+      - POSTGRES_USER=${DB_USERNAME}
+      - POSTGRES_PASSWORD=${DB_PASSWORD}
+      - POSTGRES_DB=schedule_reservation_system
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+
+  app:
+    build:
+      context: .
+      args:
+        ENV_FILE_PATH: ${ENV_FILE_PATH}
+    container_name: schedule_reservation_system
+    restart: always
+    depends_on:
+      - db
+    ports:
+      - "8080:8080"
+    environment:
+      - DB_NAME=schedule_reservation_system
+      - DB_USERNAME=${DB_USERNAME}
+      - DB_PASSWORD=${DB_PASSWORD}
+      - DB_HOST=db
+
+volumes:
+  postgres_data: