Improvements Based on Feedback from 4/19/23

[venuswku]

1. Fix downloaded time-series CSV file.
   • use NaN for unavailable values (4/20/23)
   • rename app as "Elwha Topo-Bathy Viewer" (4/20/23)
2. Document how to restructure code for a new dataset.
   • separate customized time period and data category widgets for Elwha collection (4/25/23)
   • refactor classes to contain reusable widgets for any inputted dataset (4/26/23)
   • dedicate a Wiki page for how to view a new dataset with the app (4/27/23 & 4/28/23)
3. Get app ready for Dan to share a demo with Peter.
   • use Panel's admin profiler to get a rough estimate of required RAM, memory, cores, etc. in order to run app (4/21/23)
     • max 1GB of memory/RAM
     • max 10% CPU
   • fix failing MyBinder build (4/19/23 & 4/21/23 & 4/24/23)
     • data isn't appearing on map though
   • try deploying app with Heroku or Google Colab (4/28/23)
     • got a working app with Heroku’s Container Registry, but it requires $7/month to deploy our Docker container as a Heroku dyno
   • try using Docker to avoid users from getting dependency conflicts on different machines when creating their conda environment (most of May)
     • successfully build a Docker image
       • use Dockerfile and .dockerignore as build context
       • fix bugs that arose from dependencies (e.g HoloViews, GeoViews, Panel) updating
     • run Docker image in a Docker container locally with Docker Desktop
     • wait for Peter to implement Docker in CMGDS server
4. Raise several issues on GitHub.
   • update GeoViews to be compatible with Bokeh 3.1.0 in order to allow customizing number of columns in plot legends (4/19/23)
     • wait for HoloViews 1.16.0 to be released
     • PR for legend_cols update was recently merged this past Monday
   • Bokeh legends disappear completely with more than 12 items (4/20/23)
     • don't need to write issue!
     • just set legend_limit option >= number of overlaid point and curve plots (default limit was 25 glyphs/plots)
     • (optional) ask how to display more than one value dimension in DataShader's hover tooltip