FROM node:20-alpine

WORKDIR /app

# Install dependencies for blog build
COPY www/package.json ./www/package.json
RUN cd www && npm install --silent 2>/dev/null || true

# Copy www source files
COPY www/ /app/www/

# Build blog (processes _posts/*.md to blog/*.html)
RUN node www/build-blog.js

# Run envsubst on HTML files
RUN apk add --no-cache gettext && \
    chmod +x /docker-entrypoint.d/*.sh 2>/dev/null || true

# Copy entrypoint
COPY docker-entrypoint.d/ /docker-entrypoint.d/
RUN chmod +x /docker-entrypoint.d/*.sh

# Copy to nginx document root
COPY --from=0 /app/www/ /usr/share/nginx/html/

ENTRYPOINT ["/docker-entrypoint.d/30-envsubst.sh", "--", "nginx", "-g", "daemon off;"]