clean up tests and static analysis findings

Author: jeremyhahn

.settings/language.settings.xml

@@ -1,10 +1,17 @@
 FROM python:3.11-bookworm
 
 # Build environment for cwebsocket and Autobahn wstest inside the container only
+# Includes all QA and analysis tools: valgrind, cppcheck, flawfinder, clang, lcov
 RUN apt-get update \
     && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
         build-essential autoconf automake libtool pkg-config \
         libssl-dev libev-dev zlib1g-dev \
+        valgrind \
+        cppcheck \
+        flawfinder \
+        clang \
+        clang-tools \
+        lcov \
     && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /app