I planned to follow this guide.

ubuntu@wandboard:~$ sudo apt install tightvncserver
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  libdrm-amdgpu1 libdrm-common libdrm-nouveau2 libdrm-radeon1 libdrm2 libfontenc1 libgl1 libgl1-mesa-dri libglapi-mesa libglvnd0 libglx-mesa0 libglx0 libice6 libllvm9 libsensors-config libsensors5
  libsm6 libx11-xcb1 libxaw7 libxcb-dri2-0 libxcb-dri3-0 libxcb-glx0 libxcb-present0 libxcb-shape0 libxcb-sync1 libxcomposite1 libxcursor1 libxdamage1 libxext6 libxfixes3 libxft2 libxi6 libxinerama1
  libxkbfile1 libxmu6 libxmuu1 libxrandr2 libxrender1 libxshmfence1 libxt6 libxtst6 libxv1 libxxf86dga1 libxxf86vm1 x11-common x11-utils x11-xserver-utils xauth xfonts-base xfonts-encodings xfonts-utils
Suggested packages:
  lm-sensors tightvnc-java mesa-utils nickle cairo-5c xorg-docs-core
The following NEW packages will be installed:
  libdrm-amdgpu1 libdrm-common libdrm-nouveau2 libdrm-radeon1 libdrm2 libfontenc1 libgl1 libgl1-mesa-dri libglapi-mesa libglvnd0 libglx-mesa0 libglx0 libice6 libllvm9 libsensors-config libsensors5
  libsm6 libx11-xcb1 libxaw7 libxcb-dri2-0 libxcb-dri3-0 libxcb-glx0 libxcb-present0 libxcb-shape0 libxcb-sync1 libxcomposite1 libxcursor1 libxdamage1 libxext6 libxfixes3 libxft2 libxi6 libxinerama1
  libxkbfile1 libxmu6 libxmuu1 libxrandr2 libxrender1 libxshmfence1 libxt6 libxtst6 libxv1 libxxf86dga1 libxxf86vm1 tightvncserver x11-common x11-utils x11-xserver-utils xauth xfonts-base
  xfonts-encodings xfonts-utils
0 upgraded, 52 newly installed, 0 to remove and 0 not upgraded.
Need to get 27.5 MB of archives.
After this operation, 482 MB of additional disk space will be used.
Do you want to continue? [Y/n] n 

482MB for a VNC-server? Really? No, thank you.

Vino VNC-server is even worse: 903MB.  x11vnc is also 482MB.  TigerVNC is 483MB. directVNC is 474MB.
The actual VNC-server is smaller than 0.5GB of course but it needs the graphical environment, which makes up most of the download.