build(dev-container): fix yarn not found error #1269

Primary change:
------------------

The post-create-command.sh script will now run the
install-yarn script prior to calling the configure script.
This wil lensure that yarn is installed by the time the
configure script is invoked.

Secondary change(s):
------------------------

Applied automatic formatting to the Dockerfile and the
aforementioned post-create-commands script as well.

Fixes #1269

Signed-off-by: Peter Somogyvari <peter.somogyvari@accenture.com>

.devcontainer/Dockerfile

@@ -1,4 +1,4 @@
-# Note: You can use any Debian/Ubuntu based image you want. 
+# Note: You can use any Debian/Ubuntu based image you want.
 FROM mcr.microsoft.com/vscode/devcontainers/base:ubuntu-20.04
 
 # [Option] Install zsh
@@ -22,7 +22,7 @@ RUN apt-get update \
     && /bin/bash /tmp/library-scripts/docker-in-docker-debian.sh "${ENABLE_NONROOT_DOCKER}" "${USERNAME}" "${USE_MOBY}" \
     # Clean up
     && apt-get autoremove -y && apt-get clean -y && rm -rf /var/lib/apt/lists/* /tmp/library-scripts/
-    
+
 # Install software properties
 RUN apt-get update \
     && apt-get install software-properties-common -y
@@ -38,8 +38,8 @@ RUN apt-get update \
 
 VOLUME [ "/var/lib/docker" ]
 
-# Setting the ENTRYPOINT to docker-init.sh will start up the Docker Engine 
-# inside the container "overrideCommand": false is set in devcontainer.json. 
+# Setting the ENTRYPOINT to docker-init.sh will start up the Docker Engine
+# inside the container "overrideCommand": false is set in devcontainer.json.
 # The script will also execute CMD if you need to alter startup behaviors.
 ENTRYPOINT [ "/usr/local/share/docker-init.sh" ]
 CMD [ "sleep", "infinity" ]

.devcontainer/post-create-commands.sh

@@ -2,11 +2,12 @@
 
 set -e
 
-whoami 
+whoami
 
 NEW_PATH_ELEMENT="~/bin/"
 echo "export PATH=\"$NEW_PATH_ELEMENT\":\${PATH}" >> ~/.bashrc
 
 docker info
 
+npm run install-yarn
 npm run configure