enhancement: scroll the precip graph to the present on mobile (issue #1)

[citrusvanilla]

Programmatically scrolling the graph's wrapper container the number of pixels defined by $mobileBreakpoint (1000px) from the left edge ensures that the graph's canvas will always be anchored on its right side to its wrapper. This does not affect desktop container/canvas positioning in accordance with issue #1 acceptance criteria.

Though this addresses the issue, I personally don't think it provides the best UX as the y-axis tick labels ("inches of precip") are no longer visible by default. To address this you could place y-axis on both side of the chart though this also would provide poor UX as people are not accustomed to reading charts in this manner. A better option would be to reconfigure the layout of the chart for mobile screens altogether (using the same dependency, chartjs 2.7.x), which I can take a stab at if you are willing to revisit.

Also completely unrelated but I'm not a Ruby/Rails person but it seems that perhaps the official Ruby Docker images are pulling some dependencies without pinned versions, including some gem/lib called 'activesupport'. A major release, 7.0, seems to have been tagged in middle of December. The ruby 2.6 image appears to be pulling this 7.0 active support version which requires ruby 2.7+, so the Docker images won't build as is (unless I am missing something as I am using Mac OSX Big Sur). My local solution was to bump the ruby Docker image to 2.7 and make the associated change in the Gemfile.

[Syntaf]

Hey @citrusvanilla - sorry for the late reply I somehow didn't get this notification. Appreciate the help! I need to do some K8s maintenance this week so I'll try and get this merged in and included.