FROM node:18-alpine

WORKDIR /app

# Copy npm config
COPY .npmrc ./

# Copy package files
COPY backend/package*.json ./

# Install dependencies - handle npm bug with explicit install
RUN npm cache clean --force && \
    npm install --no-optional --legacy-peer-deps || true && \
    npm install express express-session bcryptjs dotenv cors multer fs-extra && \
    test -d node_modules/express || (ls -la node_modules/ && echo "FATAL: express not found" && exit 1)

# Copy application code
COPY backend/src ./src
COPY frontend ./frontend

EXPOSE 4001

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