add TZ env var to prevent system-looking errors

As discussed in #720, these errors are resolved by setting the TZ variable. Setting that variable in the images should ensure that these errors are not seen across a wide array of environments.
rstudio · Apr 18, 2024 · 1c0c92f · 1c0c92f
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diff --git a/content/base/Dockerfile.ubuntu2204 b/content/base/Dockerfile.ubuntu2204
@@ -18,6 +18,7 @@ RUN apt-get update \
 ENV LANG en_US.UTF-8
 ENV LANGUAGE en_US:en
 ENV LC_ALL en_US.UTF-8
+ENV TZ=UTC
 
 # Installation prerequisites --------------------------------------------------#
 # curl is used to download things.

diff --git a/product/base/Dockerfile.ubuntu2204 b/product/base/Dockerfile.ubuntu2204
@@ -129,6 +129,7 @@ RUN localedef -i en_US -f UTF-8 en_US.UTF-8
 ENV LANG en_US.UTF-8
 ENV LANGUAGE en_US:en
 ENV LC_ALL en_US.UTF-8
+ENV TZ=UTC
 
 ### Clean up ###
 RUN apt-get install -yqf --no-install-recommends \