# --- build stage -------------------------------------------------------------
# Use the Alpine-flavored Bun image so the compiled binary is musl-linked and
# runs directly on the Alpine runtime image below.
FROM oven/bun:1-alpine AS build
WORKDIR /app

# Install deps first for better layer caching.
COPY package.json bun.lock ./
RUN bun install --frozen-lockfile

# Build the client bundles into assets/dist, then compile the server into a
# single standalone binary that embeds the Bun runtime.
COPY . .
RUN bun run build && bun build --compile src/index.ts --outfile zbin-server

# --- runtime stage -----------------------------------------------------------
FROM alpine:3.21
WORKDIR /app

# The musl-linked Bun binary still dynamically links libstdc++/libgcc.
# catatonit is a tiny init that reaps zombies and forwards signals to the server.
RUN apk add --no-cache libstdc++ libgcc catatonit

# The compiled server plus the static assets it serves from ./assets at runtime.
COPY --from=build /app/zbin-server ./zbin-server
COPY --from=build /app/assets ./assets

EXPOSE 3000
ENTRYPOINT ["/usr/bin/catatonit", "--"]
CMD ["./zbin-server"]