apple M1 chip related notes

README.md

@@ -15,3 +15,12 @@ Docker image that would help you knitt an rmarkdown in a bash shell or fire up i
 1. `docker-compose build <my service name>` (may need sudo to fireup docker daemon)
 2. `docker-compose run --rm <my service name>`
 3.  :tada: may the force be with you! 
+
+----
+
+*Note:* 
+This image is for macs with apple M1 chip. 
+- https://cloud.r-project.org/bin/linux/ubuntu/focal-cran40/
+- https://docs.docker.com/desktop/mac/apple-silicon/
+
+For Intel chip systems, you can remove `platform: linux/amd64` in `docker-compose.yml` file.