Add cloud debug agent to Docker image

services/git-bridge/Dockerfile

@@ -28,10 +28,16 @@ FROM openjdk:11-jre
 RUN apt-get update && apt-get install -y git sqlite3 procps htop net-tools sockstat \
  && rm -rf /var/lib/apt/lists
 
+# Install Google Cloud Profiler agent
 RUN mkdir -p /opt/cprof && \
   wget -q -O- https://storage.googleapis.com/cloud-profiler/java/latest/profiler_java_agent.tar.gz \
   | tar xzv -C /opt/cprof
 
+# Install Google Cloud Debugger agent
+RUN mkdir /opt/cdbg && \
+  wget -qO- https://storage.googleapis.com/cloud-debugger/compute-java/debian-wheezy/cdbg_java_agent_gce.tar.gz | \
+  tar xvz -C /opt/cdbg
+
 RUN useradd --create-home node
 
 COPY --from=builder /git-bridge.jar /