5eb3374ac0
Node 21 was a non-LTS release, EOL June 2024. Node 22 is the current Active LTS, supported through April 2027.
55 lines
1.8 KiB
Docker
55 lines
1.8 KiB
Docker
# Stage 1: Build the application
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# node:22-alpine — Node 22 is the current Active LTS (supported through April 2027).
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FROM node:22-alpine AS builder
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WORKDIR /app
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# Install dependencies first for better Docker layer caching.
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# This step only reruns if package.json or package-lock.json changes.
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COPY package*.json ./
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RUN npm install
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# Copy the rest of the source code.
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COPY . .
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# Build Argument to determine build environment (staging, prod, or production).
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# Defaults to "staging".
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ARG BUILD_MODE=staging
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ENV NODE_ENV=production
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# Sync the SvelteKit project to generate ./.svelte-kit/tsconfig.json
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# and other required files, which avoids the build warning.
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RUN npx svelte-kit sync
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# Perform the build based on the BUILD_MODE argument.
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# This runs the existing scripts in package.json, which already
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# handle copying the correct .env file to .env.production for Vite.
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RUN if [ "$BUILD_MODE" = "prod" ] || [ "$BUILD_MODE" = "production" ]; then \
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npm run build:prod; \
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else \
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npm run build:staging; \
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fi
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# Stage 2: Final runtime image
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FROM node:22-alpine AS deploy-node
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WORKDIR /app
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# Copy only the built files and necessary scripts from the builder stage.
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COPY --from=builder /app/build .
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COPY --from=builder /app/package.json .
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# Install only production dependencies for a smaller, cleaner image.
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RUN npm install --omit=dev
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# Copy the resulting .env.production file to .env.
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# adapter-node reads from .env at runtime for non-PUBLIC_ variables.
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COPY --from=builder /app/.env.production .env
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# SvelteKit (via adapter-node) defaults to port 3000.
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EXPOSE 3000
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# Healthcheck to verify the app is running
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HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
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CMD node -e "fetch('http://localhost:3000/health').then(r => r.ok ? process.exit(0) : process.exit(1)).catch(() => process.exit(1))"
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CMD ["node", "index.js"]
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