Initial fetch and save sensor data

[fungjj92]

Overview

The app markers will change their display depending on sensor data read regularly from real USGS sensors/data feeds. This app puts into place the initial work connecting the sensors to the app. Certainly more work will follow in terms of error handling, using back up data sources, persisting data, etc.

The requests to the 3 sensors are batch requested and handled at once. There's notably no error handling yet.

Sensors set to poll every 10 minutes, subj to change.

Connects #20

Demo

Sensors polling at 1 minute for testing:

Notes

I decided to try out async/await. I don't know that the implementation is more readable or effective than the standard request/then/catch promise workflow. Let me know your thoughts!

Also, I added changes to the Vagrantfile that helped my VM stop freezing -- it's the same set of change I've been applying to other projects. Matt noted this same change that helps me, to mount files via nfs, broke the VM on his linux machine so hopefully this change should work for linux machines too -- untested.

Testing Instructions

vagrant reload ./scripts/update ./scripts/server Upon starting or refreshing the app the requests should fire

[caseycesari]

I'm having trouble getting the VM to start-up on this branch due to the NFS changes. Using NFS has worked in the past for me without issue and I'm generally a fan of using it to avoid the VM locking up. Is there something different about the setup here? Here's the error message:

==> default: Preparing to edit /etc/exports. Administrator privileges will be required...
Password:
tee: /etc/exports: Operation not permitted
tee: /etc/exports: Operation not permitted
tee: /etc/exports: Operation not permitted
tee: /etc/exports: Operation not permitted
The nfsd service does not appear to be running.
Starting the nfsd service
==> default: Mounting NFS shared folders...
The following SSH command responded with a non-zero exit status.
Vagrant assumes that this means the command failed!

mount -o vers=3,udp,vers=3,udp,actimeo=1 192.168.110.1:/Users/ccesari/projects/ism-watershed-wellness-snapshot /vagrant

Stdout from the command:

Stderr from the command:

mount.nfs: Connection timed out

[fungjj92]

Hm I'll look into it. For testing this PR, perhaps drop that commit de9d129 on your local branch for now.

[caseycesari]

@fungjj92 this https://github.com/hashicorp/vagrant/issues/10234#issuecomment-424305964 combined with https://github.com/hashicorp/vagrant/issues/10234#issuecomment-427051144 fixed it for me. Thanks for the suggestion.

[fungjj92]

Thanks for reviews. I believe everything should be addressed, including the ghost multiple requests / 2n logs.