Add ENV to allow hiding startup message

[peterbaricic]

Hi,
our devops team wanted me to disable the startup message, but because there is no way to turn it off, I added an ENV STRAPI_HIDE_STARTUP_MESSAGE to allow user to hide the startup message.

I would also update the docs, but there is no documentation currently mentioning any existing logging ENVs like STRAPI_LOG_LEVEL, STRAPI_LOG_PRETTY_PRINT, STRAPI_LOG_FORCE_COLOR and STRAPI_LOG_TIMESTAMP.

[derrickmehaffy]

@alexandrebodin @lauriejim maybe we need to make a place on the documentation to cover any existing environment variables in use? (For example the JWT_SECRET)

[alexandrebodin]

Internal env var should start with STRAPI.

[codecov]

Codecov Report

Merging #6348 into master will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #6348      +/-   ##
==========================================
- Coverage   19.99%   19.98%   -0.01%     
==========================================
  Files         858      858              
  Lines       12095    12094       -1     
  Branches     1965     1965              
==========================================
- Hits         2418     2417       -1     
  Misses       8092     8092              
  Partials     1585     1585              

Flag	Coverage Δ
#front	14.67% <ø> (ø)
#unit	41.69% <100.00%> (-0.03%)	⬇️

Impacted Files	Coverage Δ
packages/strapi-plugin-upload/services/Upload.js	17.03% <100.00%> (-0.62%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 94e031e...408eaee. Read the comment docs.

[alexandrebodin]

We should revert the logic. The message should be displayed by default.

[peterbaricic]

why is travis always failing on E2E mysql (full pool)?

[derrickmehaffy]

why is travis always failing on E2E mysql (full pool)?

You can ignore this for now, work is being done to try and solve this not only in tests but user projects as well (some default options I believe are set too low)

[alexandrebodin]

Hi @peterbaricic would you mind working on adding this var to the documentation ?

@lauriejim Can you tell us where you would put these docs ?

[peterbaricic]

Sure, I can add it, just please point me to the right docs :-)

[lauriejim]

Hello and sorry for the delay.
Since we haven't specific documentation for global env variable, I think you can add a paragraph on this page:
https://strapi.io/documentation/v3.x/cli/CLI.html#strapi-start

[...]. Certain features are disabled in the `strapi start` mode because they require application restarts.

Allowed environment variables:

| Property | Description | Type | Default |
| --------- | ----------- | ----- | ------- |
| STRAPI_HIDE_STARTUP_MESSAGE | [your description...] values can be `true` or `false` | string | `true` |

Having a table like this could be a good option.

[alexandrebodin]

LGTM, Thanks for the addon !

Eventually I think we should replace the console logs with strapi logger so you can disable all the logs at once too