###
### Frontend development image (hot reload)
### Runs CRA dev server for fast iteration behind Traefik
###

FROM node:18-alpine

WORKDIR /app

# Install dependencies
COPY package*.json ./
RUN npm install --silent

# Copy source code
COPY . .

# Dev-friendly env for Docker volumes
ENV CHOKIDAR_USEPOLLING=true \
    WATCHPACK_POLLING=true \
    WDS_SOCKET_PORT=0 \
    DANGEROUSLY_DISABLE_HOST_CHECK=true

EXPOSE 3000

# Start CRA dev server (HMR)
CMD ["npm", "start"]