refactor(cistech-tunnel): remove all systemd dependencies

- Dockerfile: Removed systemd, systemd-sysv, network-manager packages
- Dockerfile: Removed systemd service cleanup, vnc.service, cgroup volume
- docker-compose.json/yml: Removed /sys/fs/cgroup volume mount
- Bumped tipi_version to 4

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/cistech-tunnel/build/Dockerfile

@@ -5,7 +5,6 @@ LABEL description="OpenConnect SSO VPN in Docker with noVNC"
 LABEL version="1.0.0"
 
 ENV DEBIAN_FRONTEND=noninteractive
-ENV container=docker
 
 # VNC/noVNC settings
 ENV DISPLAY=:1
@@ -17,10 +16,8 @@ ENV PLAYWRIGHT_BROWSERS_PATH=/ms-playwright
 ENV VIRTUAL_ENV=/opt/venv
 ENV PATH=/opt/venv/bin:$PATH
 
-# Install systemd and dependencies
+# Install dependencies (no systemd)
 RUN apt-get update && apt-get install -y \
-    systemd \
-    systemd-sysv \
     dbus \
     dbus-x11 \
     libgtk-3-0 \
@@ -28,7 +25,6 @@ RUN apt-get update && apt-get install -y \
     libstdc++6 \
     iptables \
     libxml2 \
-    network-manager \
     zlib1g \
     policykit-1 \
     xdg-utils \
@@ -68,38 +64,17 @@ RUN apt-get update && apt-get install -y \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/*
 
-# Remove unnecessary systemd services that cause issues in containers
-RUN rm -f /lib/systemd/system/multi-user.target.wants/* \
-    /etc/systemd/system/*.wants/* \
-    /lib/systemd/system/local-fs.target.wants/* \
-    /lib/systemd/system/sockets.target.wants/*udev* \
-    /lib/systemd/system/sockets.target.wants/*initctl* \
-    /lib/systemd/system/sysinit.target.wants/systemd-tmpfiles-setup* \
-    /lib/systemd/system/systemd-update-utmp*
-
 # Install openconnect-sso with playwright
 RUN python3 -m venv "$VIRTUAL_ENV" && \
     pip install --no-cache-dir openconnect-sso[full] playwright keyring keyrings.alt && \
     python -m playwright install --with-deps chromium
 
 RUN mkdir -p /opt/scripts /shared
-RUN echo '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' \
-| base64 -d > /opt/scripts/startup-vnc.sh && \
-chmod +x /opt/scripts/startup-vnc.sh
-
-RUN echo 'W1VuaXRdCkRlc2NyaXB0aW9uPVZOQyBhbmQgbm9WTkMgU2VydmVyCkFmdGVyPW5ldHdvcmsudGFyZ2V0CgpbU2VydmljZV0KVHlwZT1zaW1wbGUKRXhlY1N0YXJ0PS9vcHQvc2NyaXB0cy9zdGFydHVwLXZuYy5zaApSZXN0YXJ0PWFsd2F5cwpSZXN0YXJ0U2VjPTUKRW52aXJvbm1lbnQ9SE9NRT0vcm9vdApFbnZpcm9ubWVudD1VU0VSPXJvb3QKCltJbnN0YWxsXQpXYW50ZWRCeT1tdWx0aS11c2VyLnRhcmdldAo=' \
-| base64 -d > /lib/systemd/system/vnc.service
-RUN chmod 644 /lib/systemd/system/vnc.service && \
-    systemctl enable vnc.service
 
 # Copy entrypoint script
 COPY scripts/entrypoint.sh /opt/scripts/
 RUN chmod +x /opt/scripts/entrypoint.sh
 
-VOLUME ["/sys/fs/cgroup"]
-
 EXPOSE 5901 6092
 
-STOPSIGNAL SIGRTMIN+3
-
 CMD ["/opt/scripts/entrypoint.sh"]