refactor: implement multi-stage builds

Dockerfile

@@ -1,4 +1,4 @@
-FROM node:20-alpine
+FROM node:20-alpine AS builder
 
 WORKDIR /usr/src/app
 
@@ -14,6 +14,15 @@ RUN npm ci --prefix server
 COPY . .
 
 ARG VERSION
+ENV DATABASE_URL=file:../../data/app.db
+
+RUN npm run batch:writeVersion -- $VERSION
+RUN npm run build
+
+FROM node:20-alpine
+
+WORKDIR /usr/src/app
+
 ENV NEXT_PUBLIC_COGNITO_POOL_ENDPOINT=http://localhost:5000
 ENV NEXT_PUBLIC_COGNITO_POOL_ID=ap-northeast-1_randomPoolId
 ENV NEXT_PUBLIC_COGNITO_CLIENT_ID=random-client-id
@@ -26,8 +35,17 @@ ENV SMTP_PORT=2500
 ENV SMTP_USER=fake_mail_user
 ENV SMTP_PASS=fake_mail_password
 
-RUN npm run batch:writeVersion -- $VERSION
-RUN npm run build
+COPY --from=builder /usr/src/app/client/.next ./client/.next
+COPY client/package.json client/package-lock.json ./client/
+RUN npm ci --omit=dev --prefix client
+
+COPY server/package.json server/package-lock.json ./server/
+RUN npm ci --omit=dev --prefix server
+
+COPY --from=builder /usr/src/app/server/index.js ./server/index.js
+COPY --from=builder /usr/src/app/server/node_modules/.prisma/client ./server/node_modules/.prisma/client
+COPY package.json .
+RUN npm install -g npm-run-all
 RUN apk --no-cache add curl
 
 HEALTHCHECK --interval=5s --timeout=5s --retries=3 CMD curl -f $API_ORIGIN/health && curl -f $CORS_ORIGIN || exit 1

server/service/sendMail.ts

@@ -1,6 +1,5 @@
 import { APP_NAME } from 'api/@constants';
 import assert from 'assert';
-import { InbucketAPIClient } from 'inbucket-js-client';
 import { createTransport } from 'nodemailer';
 import type Mail from 'nodemailer/lib/mailer';
 import { ulid } from 'ulid';
@@ -30,10 +29,11 @@ export const sendMail = async (options: {
 if (import.meta.vitest) {
   const { test, expect } = import.meta.vitest;
 
-  assert(process.env.INBUCKET_URL);
-  const inbucketClient = new InbucketAPIClient(process.env.INBUCKET_URL);
-
   test('sendMail', async () => {
+    assert(process.env.INBUCKET_URL);
+
+    const { InbucketAPIClient } = await import('inbucket-js-client');
+    const inbucketClient = new InbucketAPIClient(process.env.INBUCKET_URL);
     const toAddress = `${ulid()}@example.com`;
     const text = 'aaa';