build: install tailwind

[gulfaraz]

Describe your changes

Install Tailwind CSS for use in the IBF dashboard.

Checklist before requesting a review

• I have performed a self-review of my code
• I have added tests wherever relevant
• I have made sure that all automated checks pass before requesting a review

[gulfaraz]

> test:api:all
> node --expose-gc node_modules/.bin/jest --config=jest.api.config.js --runInBand --detectOpenHandles --logHeapUsage

ts-jest[versions] (WARN) Version 4.9.5 of typescript installed has not been tested with ts-jest. If you're experiencing issues, consider using a supported version (>=2.7.0 <4.0.0). Please do not report issues in ts-jest if you are using unsupported versions.
 PASS  test/email/drought/email-uga-drought.test.ts (17.443s, 214 MB heap size)
  Should send an email for uga drought
    ✓ triggered in january (7291ms)
    ✓ non triggered any month (8319ms)

 PASS  test/email/floods/email-uga-floods.test.ts (33.934s, 215 MB heap size)
  Should send an email for uga floods
    ✓ default (8635ms)
    ✓ warning (8363ms)
    ✓ warning-to-trigger (8203ms)
    ✓ no-trigger (8111ms)

 PASS  test/email/floods/email-ssd-floods.test.ts (15.544s, 225 MB heap size)
  Should send an email for ssd floods
    ✓ default (7992ms)
    ✓ no-trigger (7274ms)

 PASS  test/email/flash-flood/email-mwi-flash-flood.test.ts (32.519s, 216 MB heap size)
  Should send an email for mwi flash flood
    ✓ default (8660ms)
    ✓ no-trigger (23583ms)

 PASS  test/email/malaria/email-eth-malaria.test.ts (16.868s, 226 MB heap size)
  Should send an email for eth malaria
    ✓ default (7592ms)
    ✓ no-trigger (9025ms)

 PASS  test/email/dengue/email-phl-dengue.test.ts (16.092s, 217 MB heap size)
  Should send an email for phl dengue
    ✓ default (8127ms)
    ✓ no-trigger (7666ms)

 PASS  test/email/typhoon/email-phl-typhoon.test.ts (13.082s, 225 MB heap size)
  Should send an email for phl typhoon
    ✓ default (12791ms)

Test Suites: 7 passed, 7 total
Tests:       15 passed, 15 total
Snapshots:   0 total
Time:        146.196s
Ran all test suites.