[Docs] Add all needed environment variables in one table

[ShahriyarR]

Description:

As per the documentation, we can see the required environment variables as a warning and a note.
From the user's perspective, it is better to see a table of environment variables with NAME, if it is required/ if it is optional/default values(if any).
In general, all required settings are in one single table.

A/C:

• Separate section in the documentation called Environment variables
• Make a table of the environment variables:

|Env name|Is required|Default value|Usage|Purpose

• Also, as an optional section, export of the variables, which we can copy and paste to the .env:

EPOINT_PUBLIC_KEY=
EPOINT_PRIVATE_KEY=

[mmzeynalli]

@ShahriyarR would this be okay?

https://integrify-sdk.netlify.app/integrations/epoint/env/

[ShahriyarR]

@ShahriyarR would this be okay?

https://integrify-sdk.netlify.app/integrations/epoint/env/

Like a charm :D

[mmzeynalli]

Fixed at #3