Fix and add instructions to address local Docker deploy issues

[griff-rees]

Deploying locally on a Mac (this doesn't seem to be an issue on the server) raises these errors:

...
-----------
 213603102
(1 row)

 setval
--------
   1460
(1 row)

ERROR:  could not extend file "base/28309/31037": No space left on device
HINT:  Check free disk space.
ERROR:  could not extend file "base/28309/31039": No space left on device
HINT:  Check free disk space.
ERROR:  could not extend file "base/28309/2606": No space left on device
HINT:  Check free disk space.
...

[griff-rees]

Clearing cache etc following the highest ranked answer on https://stackoverflow.com/questions/30604846/docker-error-no-space-left-on-device doesn't help. The default max docker image size on a local docker mac install may be the culprit. Trying out the suggestion in the Mac FAQ.

[griff-rees]

[griff-rees]

Updating the virtual disk limit addressed that issue in a local deploy.

[griff-rees]

Need to split this into multiple issues:

• Instructions to run docker system prune to free up space
• Add .dockerignore files to avoid extra build components
• Export postgres docker images for import speed
  • x86 vs m1 compatibility/speed
  • Manage version of postgres