Fixes dapr#269 dev container broken on M1/ARM

Author: paulyuk

.devcontainer/Dockerfile

@@ -3,7 +3,7 @@
 # Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information.
 #-------------------------------------------------------------------------------------------------------------
 
-FROM python:3.7-buster
+FROM python:3.9-bullseye
 
 # Avoid warnings by switching to noninteractive
 ENV DEBIAN_FRONTEND=noninteractive
@@ -30,7 +30,7 @@ RUN apt-get update \
     # Install Docker CE CLI
     && apt-get install -y apt-transport-https ca-certificates curl gnupg-agent software-properties-common lsb-release \
     && curl -fsSL https://download.docker.com/linux/$(lsb_release -is | tr '[:upper:]' '[:lower:]')/gpg | (OUT=$(apt-key add - 2>&1) || echo $OUT) \
-    && add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/$(lsb_release -is | tr '[:upper:]' '[:lower:]') $(lsb_release -cs) stable" \
+    && add-apt-repository "deb [arch=$(dpkg --print-architecture)] https://download.docker.com/linux/$(lsb_release -is | tr '[:upper:]' '[:lower:]') $(lsb_release -cs) stable" \
     && apt-get update \
     && apt-get install -y docker-ce-cli \
     #