pin brave-browser package version

Dockerfile

@@ -5,14 +5,17 @@ RUN apt-get update \
     && apt-get install --yes --no-install-recommends \
         ca-certificates \
         gnupg \
-    && apt-key adv --keyserver pool.sks-keyservers.net --recv-keys D8BAD4DE7EE17AF52A834B2D0BB75829C2D4E821 \
+    && apt-key adv --keyserver pool.sks-keyservers.net \
+        --recv-keys D8BAD4DE7EE17AF52A834B2D0BB75829C2D4E821 \
     && rm -rf /var/lib/apt/lists/* \
     && echo "deb [arch=amd64] https://brave-browser-apt-release.s3.brave.com/ stable main" \
         > /etc/apt/sources.list.d/brave-browser-release.list \
     && useradd --create-home browser
 
+ARG BRAVE_BROWSER_PACKAGE_VERSION=1.20.103
 RUN apt-get update \
-    && apt-get install --yes --no-install-recommends brave-browser \
+    && apt-get install --yes --no-install-recommends \
+        brave-browser=$BRAVE_BROWSER_PACKAGE_VERSION \
     && rm -rf /var/lib/apt/lists/*
 
 USER browser