Remove non-deterministic npm install -g npm from devcontainer Dockerfile (#956)

* Initial plan

* Fix alert #129: Remove non-deterministic npm install from devcontainer Dockerfile

Agent-Logs-Url: https://github.com/github/safe-settings/sessions/0af97764-5b14-4195-ad8a-6b8adf723453

Co-authored-by: decyjphr <57544838+decyjphr@users.noreply.github.com>

* Fix typo in devcontainer Dockerfile comment (Intall -> Install)

Agent-Logs-Url: https://github.com/github/safe-settings/sessions/0af97764-5b14-4195-ad8a-6b8adf723453

Co-authored-by: decyjphr <57544838+decyjphr@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: decyjphr <57544838+decyjphr@users.noreply.github.com>

Author: Copilot

.devcontainer/Dockerfile

@@ -14,9 +14,7 @@ RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
 # [Optional] Uncomment if you want to install more global node modules
 # RUN su node -c "npm install -g <your-package-list-here>"
 
-# Update npm
-RUN npm install -g npm
-# Intall aws cli
+# Install aws cli
 RUN curl "https://awscli.amazonaws.com/awscli-exe-linux-$(uname -m).zip" -o "awscliv2.zip" && \
   unzip awscliv2.zip && \
   sudo ./aws/install && \