Add devbox image Dockerfiles and build scripts, split from homelab-komodo

devbox/vnc/Dockerfile

@@ -0,0 +1,27 @@
+FROM coder-devbox-base-config:latest AS base-default
+
+USER root
+
+# XFCE4 desktop + TigerVNC + noVNC — browser-based desktop access (no native
+# VNC client needed), for running/testing GUI apps (e.g. Flutter Linux
+# builds) that need a real display.
+RUN DEBIAN_FRONTEND=noninteractive apt-get update -qq \
+    && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+       xfce4 xfce4-terminal dbus-x11 \
+       tigervnc-standalone-server tigervnc-common \
+       novnc websockify \
+       fonts-dejavu-core \
+       x11vnc \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+# x11vnc is installed only for its `storepasswd` tool — this Ubuntu
+# tigervnc-standalone-server/tigervnc-common split ships no vncpasswd
+# equivalent at all (checked dpkg -L and Xtigervnc -help), but the VNC
+# password file format is a shared standard, so x11vnc's tool can generate
+# the file that Xtigervnc/tigervncserver reads. x11vnc itself is never run.
+
+# Lives outside /home/coder — see vnc-startup.sh header comment.
+COPY ./vnc-startup.sh /usr/local/bin/vnc-startup.sh
+RUN chmod +x /usr/local/bin/vnc-startup.sh
+
+USER coder