Dockerfile

# Use Bun's official image
FROM oven/bun:1 AS base

WORKDIR /app

# Install dependencies with bun
FROM base AS deps
COPY package.json bun.lock* ./
RUN bun install --frozen-lockfile

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

# Next.js collects completely anonymous telemetry data about general usage.
# Uncomment to disable telemetry during build.
# ENV NEXT_TELEMETRY_DISABLED=1

ENV SKIP_ENV_VALIDATION=1

# NEXT_PUBLIC_ vars are inlined into the client bundle at build time
ARG NEXT_PUBLIC_API_URL
ENV NEXT_PUBLIC_API_URL=$NEXT_PUBLIC_API_URL
ARG NEXTAUTH_URL
ENV NEXTAUTH_URL=$NEXTAUTH_URL
ARG NEXTAUTH_SECRET
ENV NEXTAUTH_SECRET=$NEXTAUTH_SECRET
ARG AUTH_KEYCLOAK_ID
ENV AUTH_KEYCLOAK_ID=$AUTH_KEYCLOAK_ID
ARG AUTH_KEYCLOAK_SECRET
ENV AUTH_KEYCLOAK_SECRET=$AUTH_KEYCLOAK_SECRET
ARG AUTH_KEYCLOAK_ISSUER
ENV AUTH_KEYCLOAK_ISSUER=$AUTH_KEYCLOAK_ISSUER

RUN bun run build

# Production image
FROM base AS runner
WORKDIR /app

# Uncomment to disable telemetry during runtime.
# ENV NEXT_TELEMETRY_DISABLED=1

ENV NODE_ENV=production \
    PORT=3000 \
    HOSTNAME="0.0.0.0"

RUN groupadd --system --gid 1001 nodejs && \
    useradd --system --uid 1001 --no-log-init -g nodejs nextjs

COPY --from=builder /app/public ./public

# Leverage output traces to reduce image size
# Requires output: 'standalone' in next.config.ts
COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static

USER nextjs

EXPOSE 3000

CMD ["bun", "./server.js"]