Alternative-to-only-previous method of loading QGIS Desktop via Ubuntu Emulator without sharing system/user data

qgis_desktop_via_ubuntu_emulator.md

WHY: I frequently have to transfer geospatial projects between work and personal Macs & then get caught catching systems up from recent changes. I really wanted to use github/docker-qgis-desktop (from DockerHub), but felt referencing my system user was sketchy & found it just as problematic when porting.

STEPS: We're going to combine github/docker-ubuntu-vnc-desktop with qgis.org/download/ubuntu#steps

1. Create Dockerfile

   FROM dorowu/ubuntu-desktop-lxde-vnc:focal
   
   ENV USER=dinos
   ENV HTTP_PASSWORD=go_rawr
   
   RUN apt-get update --fix-missing
   RUN sudo apt-get install -y qgis qgis-plugin-grass
   
   RUN rm -rf /var/lib/apt/lists/*
   RUN rm -r /root/.cache
   

2. Build (from Dockerfile's directory)

   docker build . --tag qgis_on_ubuntu_emulator < Dockerfile
   

   WIP Note: Still figuring out how to reduce the bloat, but majority is base image

   $  docker image list
   REPOSITORY                                      TAG          IMAGE ID       CREATED          SIZE
   qgis_on_ubuntu_emulator                         latest       61d5b81fbfe9   10 minutes ago   2.3GB
   ubuntu_emulator                                 latest       0cc9e3efcc5d   5 months ago     1.32GB
   

3. Run (choosing localhost port 12345 because it's tickles my giggles today - aka all the fun port math numbers are busy)

   $ docker run -p 12345:80 qgis_on_ubuntu_emulator
   

   NOTE: example does not include volume/data/package persistence which is desirable, but left as an excercise to the reader

4. Open browser at http://localhost:12345/

5. Once Ubuntu machine starts up, will ask you to HTTP authenticate; use username:password pair of dinos:go_rawr (set above)

6. In Ubuntu, navigate: Start menu > Education > "QGIS Desktop" (or "GRASS GIS 7")

7. Once it opens, you're ready to click through QGIS updates & then start up a new project 🎉

SCREENSHOT