Merge branch 'main' into drewroengoogle-patch-1
diff --git a/.ci/Dockerfile b/.ci/Dockerfile
index d1ddf61..d31a997 100644
--- a/.ci/Dockerfile
+++ b/.ci/Dockerfile
@@ -4,7 +4,10 @@
# This is the hash for the 3.0.0 image.
FROM cirrusci/flutter@sha256:d99b1ba2602240a74722970b5c0cd704bbe60a7eba7557157c784f2f693c393f
-RUN apt-get update -y
+RUN apt-get update -y \
+ && apt-get -y upgrade \
+ && apt-get -y autoremove \
+ && rm -rf /var/lib/apt/lists/*
# Set up Firebase Test Lab requirements.
RUN apt-get install -y --no-install-recommends gnupg