FROM node:20-alpine

WORKDIR /app

# Install system dependencies & optimize npm
RUN apk add --no-cache git && \
    npm install -g npm@10.8.2

# Copy package files and install dependencies
COPY package*.json ./
RUN npm install --omit=dev && \
    npm cache clean --force

# Copy application files
COPY . .

# Create required directories with proper permissions
RUN mkdir -p \
    ./auth \
    ./session \
    ./downloads \
    ./auth_info_baileys && \
    chown -R node:node \
        ./auth \
        ./session \
        ./downloads \
        ./auth_info_baileys

# Switch to non-root user for security
USER node

CMD ["node", "src/index.js"]