Dockerfile

FROM node:18 AS pre
WORKDIR /app
RUN apt-get update && \
    apt-get install -y python3 make g++ build-essential libcairo2-dev libpango1.0-dev libjpeg-dev libgif-dev librsvg2-dev && \
    apt-get clean

# 1. Install dependencies only when needed
FROM pre AS deps
WORKDIR /app
RUN npm install -g node-gyp
COPY package.json yarn.lock* ./
RUN yarn install --frozen-lockfile

# 2. Rebuild the source code only when needed
FROM pre AS builder
WORKDIR /app
COPY . .
COPY --from=deps /app/node_modules ./node_modules
RUN yarn build

# 3. Production image, copy all the files you need to run the app
FROM node:18-alpine AS runner
WORKDIR /app

# Install curl for health check
RUN apk update && apk add --no-cache curl

ENV NODE_ENV production

# Build arguments for secrets
ARG NEXT_PUBLIC_API_URL
ARG NEXT_PUBLIC_GA_ID

# Set environment variables using the build arguments
ENV NEXT_PUBLIC_API_URL=$NEXT_PUBLIC_API_URL
ENV NEXT_PUBLIC_GA_ID=$NEXT_PUBLIC_GA_ID

# Copy built assets from builder stage
COPY --from=builder /app/next.config.js ./
COPY --from=builder /app/public ./public
COPY --from=builder /app/.next ./.next
COPY --from=builder /app/node_modules ./node_modules
COPY --from=builder /app/package.json ./package.json

# Expose port
EXPOSE 3000

# Start the Next.js app
CMD ["yarn", "start"]