docs/PAYMENTS: add API docs

docs: remove OSEM_ICON docs

INSTALL.md

@@ -52,7 +52,6 @@ There are a couple of environment variables you can set to configure OSEM.
 | CLOUDINARY_URL		| *string*			| Configure your cloudinary.com cloud name and api key/secret
 | STRIPE_PUBLISHABLE_KEY    | *string*          | Publishable Key for Stripe Gateway
 | STRIPE_SECRET_KEY    | *string*          | Secret Key for Stripe Gateway
-| OSEM_ICON    | *string*          | Sharable link for your organisation's icon
 
 ### Online Ticket Payments
 We use [Stripe](https://stripe.com) for accepting your ticket payments securely over the web.

PAYMENTS.md

@@ -4,6 +4,8 @@ If you have any problems with installing don't hesitate to [contact us](https://
 
 ## Configure Stripe into the application
 To configure Stripe into your application all you need to do is add the private and publishable keys into the Rails environment.
+You can register to Stripe [here](https://dashboard.stripe.com/register) and get your API keys for free.
+**You need to set the API keys provided by Stripe into the application first to get the feature running.**
 
 Add your Stripe API keys in `.env` file into these variables:
 

dotenv.example

@@ -9,9 +9,6 @@
 # The name of your page
 OSEM_NAME="OSEM"
 
-# The shareable link of your organisation's icon image
-OSEM_ICON=''
-
 # The host this OSEM instance runs on. Used for
 # generating urls in emails sent
 OSEM_HOSTNAME="localhost:3000"