[base-ubuntu] - Fix for issue with timezone data in buildpack-deps ubuntu images. (#1727)

* [base-ubuntu] - Fix for issue with timezone data in `buildpack-deps` ubuntu images.

* Added test

* Update src/base-ubuntu/.devcontainer/Dockerfile

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: Kaniska244

src/base-ubuntu/.devcontainer/Dockerfile

@@ -15,3 +15,9 @@ RUN if [ "$VARIANT" = "noble" ]; then \
 # [Optional] Uncomment this section to install additional OS packages.
 # RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
 #     && apt-get -y install --no-install-recommends <your-package-list-here>
+
+# Local fix for issue with timezone data at 'buildpack-deps'. Ref# https://github.com/devcontainers/images/issues/1709
+RUN apt-get update \
+    && export DEBIAN_FRONTEND=noninteractive \
+    && apt-get -y reinstall --no-install-recommends tzdata \
+    && rm -rf /var/lib/apt/lists/*

src/base-ubuntu/manifest.json

@@ -1,5 +1,5 @@
 {
-	"version": "2.1.3",
+	"version": "2.1.4",
 	"variants": [
 		"noble",
 		"jammy"

src/base-ubuntu/test-project/test.sh

@@ -18,6 +18,7 @@ check "set-git-config-user-name" sh -c "sudo git config --system user.name devco
 check "gitconfig-file-location" sh -c "ls /etc/gitconfig"
 check "gitconfig-contains-name" sh -c "cat /etc/gitconfig | grep 'name = devcontainers'"
 check "usr-local-etc-config-does-not-exist" test ! -f "/usr/local/etc/gitconfig"
+check "verify-timezone-data" sh -c "cat /etc/timezone | grep 'Etc/UTC'"
 
 check_ubuntu_user() {
     if ! id -u ubuntu > /dev/null 2>&1; then