Dockerfile in elastic-apm-4.6.2

- old
+ new

@@ -4,14 +4,14 @@
     && apt-get install -y libc6-dev git tcc curl netbase --no-install-recommends \
     && apt-get install -y gcc \
     && rm -rf /var/lib/apt/lists/*
 
 ENV JRUBY_VERSION 9.3.1.0
-ENV JRUBY_SHA256 9199707712c683c525252ccb1de5cb8e75f53b790c5b57a18f6367039ec79553
 
 RUN mkdir -p /opt/jruby \
+    && curl -fSL https://repo1.maven.org/maven2/org/jruby/jruby-dist/${JRUBY_VERSION}/jruby-dist-${JRUBY_VERSION}-bin.tar.gz.sha256 -o /tmp/jruby.sha256 \
     && curl -fSL https://repo1.maven.org/maven2/org/jruby/jruby-dist/${JRUBY_VERSION}/jruby-dist-${JRUBY_VERSION}-bin.tar.gz -o /tmp/jruby.tar.gz \
-    && echo "$JRUBY_SHA256 */tmp/jruby.tar.gz" | sha256sum -c - \
+    && echo "$(cat /tmp/jruby.sha256) */tmp/jruby.tar.gz" | sha256sum -c - \
     && tar -zx --strip-components=1 -f /tmp/jruby.tar.gz -C /opt/jruby \
     && update-alternatives --install /usr/local/bin/ruby ruby /opt/jruby/bin/jruby 1
 
 # set the jruby binaries in the path
 ENV PATH /opt/jruby/bin:$PATH