Dockerfile

# --- build stage -------------------------------------------------------------
FROM node:20-bullseye-slim AS builder

ARG EXCALIDRAW_REPO=https://github.com/excalidraw/excalidraw.git
ARG EXCALIDRAW_ROOM_REPO=https://github.com/excalidraw/excalidraw-room.git
ARG EXCALIDRAW_STORAGE_REPO=https://github.com/excalidraw/excalidraw-storage-backend.git

# URLs the client has to call once deployed
ENV REACT_APP_WS_SERVER_URL=/room
ENV REACT_APP_HTTP_STORAGE_BACKEND_URL=/api

RUN apt-get update -y \
 && apt-get install -y git

# --- clone & build the React client -----------------------------------------
RUN git clone --depth 1 $EXCALIDRAW_REPO /opt/excalidraw
WORKDIR /opt/excalidraw
RUN corepack enable && yarn --frozen-lockfile
RUN yarn build                                   \
    --mode=production                            \
    --env REACT_APP_WS_SERVER_URL=$REACT_APP_WS_SERVER_URL \
    --env REACT_APP_HTTP_STORAGE_BACKEND_URL=$REACT_APP_HTTP_STORAGE_BACKEND_URL

# --- clone servers (no build step needed) ------------------------------------
RUN git clone --depth 1 $EXCALIDRAW_ROOM_REPO     /opt/room
RUN git clone --depth 1 $EXCALIDRAW_STORAGE_REPO  /opt/storage

WORKDIR /opt/room
RUN yarn --production
WORKDIR /opt/storage
RUN yarn --production

# --- runtime stage -----------------------------------------------------------
FROM node:20-bullseye-slim

ENV PORT=7860
ENV ROOM_PORT=5001
ENV STORAGE_PORT=5002
ENV REDIS_PORT=6379

# install nginx, redis & supervisor
RUN apt-get update -y                                             \
 && apt-get install -y nginx redis-server supervisor              \
 && rm -rf /var/lib/apt/lists/*                                   \
 && mkdir -p /var/log/supervisor

# copy artifacts from builder
COPY --from=builder /opt /opt

# nginx routing: / → client, /room → WS server, /api → storage
COPY nginx.conf /etc/nginx/conf.d/excalidraw.conf

# supervisor keeps every service alive
COPY supervisord.conf /etc/supervisor/conf.d/supervisord.conf

EXPOSE ${PORT}
CMD ["/usr/bin/supervisord","-n"]