fix: Include tool-description.md in Docker image

Author: Paulo Ribeiro

Dockerfile

@@ -9,6 +9,7 @@ RUN go run main.go -docFolder=../docs
 FROM alpine:3.11
 
 COPY --from=builder /docs /docs
+COPY docs/tool-description.md /docs/
 COPY entry.sh /
 
 RUN adduser -u 2004 -D docker && chown -R docker:docker /docs