Docker backup

[dumbstertruck3]

Proposed Changes

• Added a script for backing up the PSQL database in the docker container
• Added docs to set up the cronjob in README.md
• Edited the compose file to mount a local directory to new directory inside the container
• Added docs to restore the container's database
• Fixed some typos

Associated Issue

• Create db backup scripts for instances running on pure docker #2301
• The backup script works perfectly
• Mounted a local directory to a new directory(backup) inside the container, so that the user can move the backed up sql file inside this local directory and restore the container's database
• The backup.md doc will help the user to restore the container's database

Architecture changes

• Added a new doc
• Added a new script in /care/scripts

Merge Checklist

• Tests added/fixed
• Update docs in /docs
• Linting Complete
• Any other necessary step

Only PR's with test cases included and passing lint and test pipelines will be reviewed

@ohcnetwork/care-backend-maintainers @ohcnetwork/care-backend-admins

[dumbstertruck3]

Been on this for months now, When i started working all i knew was a bit of shell scripting i learned for a hackathon. i was about to give up then one of the maintainers called me and told me that this will be a great opportunity for me to learn new things and he was right, i learned a damn lot. Thing is i don't get much time for doing this things, but i will be working on this, got a couple of ideas to make the restoration easier. so yeah there will be more pr's :)