readme docker file

Author: Priyanka2-Microsoft

.devcontainer/Dockerfile

@@ -1,4 +1,10 @@
 FROM mcr.microsoft.com/devcontainers/python:3.11-bookworm
 
+# Route npm/corepack traffic (used during devcontainer feature installation,
+# e.g. ghcr.io/devcontainers/features/node) through the internal package feed
+# proxy, since the public npmjs.org registry is blocked/unreachable on this
+# network and causes feature install failures (ERR_SSL_SSL/TLS_ALERT_HANDSHAKE_FAILURE).
+ENV NPM_CONFIG_REGISTRY=https://packagefeedproxy.microsoft.io/npm/
+
 # Remove Yarn repository to avoid GPG key expiration issue
 RUN rm -f /etc/apt/sources.list.d/yarn.list