FROM golang:1.21-alpine AS builder WORKDIR /app COPY go.mod ./ COPY main.go ./ COPY static/ ./static/ RUN go build -o excalidraw-library . FROM alpine:latest RUN apk --no-cache add ca-certificates WORKDIR /app COPY --from=builder /app/excalidraw-library . ENV DATA_DIR=/data ENV PORT=8080 EXPOSE 8080 CMD ["./excalidraw-library"]