install java

Author: mydea

.github/docker/playwright.Dockerfile

@@ -9,10 +9,11 @@ ARG YARN_VERSION
 # Prevent interactive prompts during package installation
 ENV DEBIAN_FRONTEND=noninteractive
 
-# Install zstd (required by actions/cache for compression) and Node.js + Yarn
-# at the versions pinned in the repo's package.json.
+# Install zstd (required by actions/cache for compression), a JRE for Firebase
+# emulators (Firestore, etc. spawn `java -version`), and Node.js + Yarn at the
+# versions pinned in the repo's package.json.
 RUN sudo apt-get update && \
-    sudo apt-get install -y --no-install-recommends zstd && \
+    sudo apt-get install -y --no-install-recommends zstd openjdk-17-jre-headless && \
     sudo rm -rf /var/lib/apt/lists/*
 RUN sudo curl -fsSL https://deb.nodesource.com/setup_${NODE_VERSION%%.*}.x | sudo bash - && \
     sudo apt-get install -y --no-install-recommends nodejs && \