Complete DDS training workflow and delivery package

sip/Dockerfile

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+FROM ubuntu:22.04
+
+ENV DEBIAN_FRONTEND=noninteractive
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends asterisk ca-certificates gettext-base openssl \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY pjsip.conf.template /opt/lct-sip/pjsip.conf.template
+COPY extensions.conf /etc/asterisk/extensions.conf
+COPY http.conf /etc/asterisk/http.conf
+COPY modules.conf /etc/asterisk/modules.conf
+COPY rtp.conf /etc/asterisk/rtp.conf
+COPY entrypoint.sh /usr/local/bin/lct-sip-entrypoint
+RUN chmod +x /usr/local/bin/lct-sip-entrypoint \
+    && mkdir -p /recordings /var/lib/lct-sip /tls \
+    && chown -R asterisk:asterisk /recordings /var/lib/lct-sip
+
+EXPOSE 5060/udp 5060/tcp 5061/tcp 8088/tcp 10000-10099/udp
+HEALTHCHECK --interval=10s --timeout=3s --retries=6 --start-period=15s \
+    CMD asterisk -rx "core show uptime" >/dev/null 2>&1 || exit 1
+
+ENTRYPOINT ["/usr/local/bin/lct-sip-entrypoint"]