本番環境用のDockerfileを作成 (#12)

Dockerfile

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+# syntax=docker/dockerfile:1
+
+# Comments are provided throughout this file to help you get started.
+# If you need more help, visit the Dockerfile reference guide at
+# https://docs.docker.com/engine/reference/builder/
+
+ARG NODE_VERSION=18.16.0
+
+################################################################################
+# Use node image for base image for all stages.
+FROM node:${NODE_VERSION}-alpine as base
+
+# Set working directory for all build stages.
+WORKDIR /usr/src/app
+
+
+################################################################################
+# Create a stage for installing production dependecies.
+FROM base as deps
+
+# Download dependencies as a separate step to take advantage of Docker's caching.
+# Leverage a cache mount to /root/.yarn to speed up subsequent builds.
+# Leverage bind mounts to package.json and yarn.lock to avoid having to copy them
+# into this layer.
+RUN --mount=type=bind,source=package.json,target=package.json \
+    --mount=type=bind,source=yarn.lock,target=yarn.lock \
+    --mount=type=cache,target=/root/.yarn \
+    yarn install --production --frozen-lockfile
+
+################################################################################
+# Create a stage for building the application.
+FROM deps as build
+
+# Copy the rest of the source files into the image.
+COPY . .
+# Run the build script.
+RUN yarn run build
+
+################################################################################
+# Create a new stage to run the application with minimal runtime dependencies
+# where the necessary files are copied from the build stage.
+FROM base as final
+
+# Use production node environment by default.
+ENV NODE_ENV production
+
+# Run the application as a non-root user.
+USER root
+
+# Copy package.json so that package manager commands can be used.
+COPY package.json .
+
+# Copy the production dependencies from the deps stage and also
+# the built application from the build stage into the image.
+COPY --from=deps /usr/src/app/node_modules ./node_modules
+COPY --from=build /usr/src/app/.next ./.next
+COPY ./public ./public
+
+# Run the application.
+CMD yarn start

docker-compose.yml

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+version: '3'
+
+services:
+  next-app:
+    container_name: portfolio
+    image: portfolio
+    build:
+      context: .
+      dockerfile: Dockerfile
+      args:
+        ENV_VARIABLE: ${ENV_VARIABLE}
+        NEXT_PUBLIC_ENV_VARIABLE: ${NEXT_PUBLIC_ENV_VARIABLE}
+    restart: always
+    ports:
+      - 4600:4600