egentrening/Dockerfile

# Use the official Node.js runtime as the base image
FROM node:20-alpine AS base

# Set the working directory inside the container
WORKDIR /app

# Copy package.json and package-lock.json (if available)
COPY package*.json ./

# Install all dependencies (including devDependencies for building)
RUN npm ci && npm cache clean --force

# Copy the rest of the application code
COPY . .

# Set build-time environment variables for SvelteKit
ARG DATABASE_URL="postgresql://builduser:buildpass@localhost:5432/builddb"
ENV DATABASE_URL=${DATABASE_URL}

# Run SvelteKit sync to generate .svelte-kit directory and prepare the build
RUN npm run prepare

# Build the application with environment variables available
RUN npm run build

# Production stage
FROM node:20-alpine AS production

# Install dumb-init for proper signal handling
RUN apk add --no-cache dumb-init

# Create a non-root user
RUN addgroup -g 1001 -S nodejs
RUN adduser -S svelte -u 1001

# Set the working directory
WORKDIR /app

# Copy package.json and package-lock.json
COPY package*.json ./

# Install only production dependencies
RUN npm ci --only=production && npm cache clean --force

# Copy the built application from the previous stage
COPY --from=base --chown=svelte:nodejs /app/build ./build
COPY --from=base --chown=svelte:nodejs /app/package.json ./package.json

# Copy environment file if it exists (optional)
COPY --chown=svelte:nodejs .env* ./ || true

# Switch to the non-root user
USER svelte

# Expose the port the app runs on
EXPOSE 3000

# Set environment variables - DATABASE_URL can be overridden at runtime
ENV NODE_ENV=production
ENV PORT=3000
ENV DATABASE_URL=""

# Use dumb-init to handle signals properly
ENTRYPOINT ["dumb-init", "--"]

# Start the application with environment file support
CMD ["node", "--env-file=.env", "build"]