ci: Build static assets for production

[tdgroot]

CSS and JS files weren't being minimized and we also didn't make sure yet that the CSS files were up to date with the SCSS files.

[vdloo]

task assets:compile
  [build] run npx gulp buildProd
  [build] [16:00:28]
  [build] Using gulpfile /__w/hypernode-docs-next/hypernode-docs-next/gulpfile.js
  [build] [16:00:28] Starting 'buildProd'...
  [build] [16:00:28] Starting 'cssCompile'...
  [build] [16:00:28]
  [build] 'cssCompile' errored after 112 ms
  [build] [16:00:28] Error: EACCES: permission denied, open '/__w/hypernode-docs-next/hypernode-docs-next/docs/_static/css/breakpoints.css'
  [build] [16:00:28] 'buildProd' errored after 115 ms
  [build]  error  in deploy.php on line 54:
  [build] exit code 1 (General error)

[vdloo]

task assets:compile
  [build] run ls -l ./docs/_static/css
  [build] total 48
  [build] -rw-r--r-- 1 root root    46 Jan 26 16:10 breakpoints.css
  [build] -rw-r--r-- 1 root root   765 Jan 26 16:10 colors.css
  [build] -rw-r--r-- 1 root root 16463 Jan 26 16:10 general.css
  [build] -rw-r--r-- 1 root root 17186 Jan 26 16:10 main.css
  [build] run whoami
  [build] root
  [build] run npx gulp buildProd
  [build] [16:11:17]
  [build] Using gulpfile /__w/hypernode-docs-next/hypernode-docs-next/gulpfile.js
  [build] [16:11:17] Starting 'buildProd'...
  [build] [16:11:17]
  [build] Starting 'cssCompile'...
  [build] [16:11:17] 'cssCompile' errored after 87 ms
  [build] [16:11:17] Error: EACCES: permission denied, open '/__w/hypernode-docs-next/hypernode-docs-next/docs/_static/css/breakpoints.css'
  [build] [16:11:17]
  [build] 'buildProd' errored after 90 ms
  [build]  error  in deploy.php on line 56:
  [build] exit code 1 (General error)

[vdloo]

task assets:compile
  [build] run ls -l ./docs/_static/css
  [build] total 48
  [build] -rw-r--r-- 1 root root    46 Jan 27 10:42 breakpoints.css
  [build] -rw-r--r-- 1 root root   765 Jan 27 10:42 colors.css
  [build] -rw-r--r-- 1 root root 16463 Jan 27 10:42 general.css
  [build] -rw-r--r-- 1 root root 17186 Jan 27 10:42 main.css
  [build] run whoami
  [build] root
  [build] run chmod -R 755 docs/_static
  [build] run npx gulp buildProd
  [build] [10:43:07]
  [build] Using gulpfile /__w/hypernode-docs-next/hypernode-docs-next/gulpfile.js
  [build] [10:43:07] Starting 'buildProd'...
  [build] [10:43:07]
  [build] Starting 'cssCompile'...
  [build] [10:43:07]
  [build] 'cssCompile' errored after 71 ms
  [build] [10:43:07]
  [build] Error: EACCES: permission denied, open '/__w/hypernode-docs-next/hypernode-docs-next/docs/_static/css/breakpoints.css'
  [build] [10:43:07] 'buildProd' errored after 74 ms
  [build]  error  in deploy.php on line 57:
  [build] exit code 1 (General error)
  Error: Process completed with exit code 1.