Dockerize existing Strapi v3

gistfile1.txt

FROM node:14 AS base

# Install dependencies only when needed
FROM base AS deps

WORKDIR /app

# Install dependencies based on the preferred package manager
COPY package.json yarn.lock* package-lock.json* pnpm-lock.yaml* ./
RUN npm install

# Rebuild the source code only when needed
FROM base AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .

RUN NODE_ENV=production npm run build

# Production image, copy all the files and run next
FROM base AS runner
WORKDIR /app

ENV NODE_ENV production

RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 strapi

# Set the correct permission for prerender cache
RUN mkdir build
RUN chown strapi:nodejs build

# Automatically leverage output traces to reduce image size
# https://nextjs.org/docs/advanced-features/output-file-tracing
COPY --from=builder --chown=strapi:nodejs /app ./

USER strapi

EXPOSE 1337

ENV PORT 1337
# set hostname to localhost
ENV HOSTNAME "0.0.0.0"

# server.js is created by next build from the standalone output
# https://nextjs.org/docs/pages/api-reference/next-config-js/output
CMD ["npm", "run", "start"]