From de97c81a7acbbde6c2dbfa19e31e252bb8c64337 Mon Sep 17 00:00:00 2001
From: Ivar Løvlie <38570165+ivarlovlie@users.noreply.github.com>
Date: Wed, 31 Mar 2021 19:17:21 +0200
Subject: Update README.md

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 README.md | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/README.md b/README.md
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--- a/README.md
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 # IOL.VippsEcommerce
+
+
+## Install
+`dotnet add package IOL.VippsEcommerce --version 1.0.0`
+
+The service targets net5.0. \
+[Nuget page](https://www.nuget.org/packages/IOL.VippsEcommerce/)
+[Fuget page](https://www.fuget.org/packages/IOL.VippsEcommerce/)
+
+## Configuration
+
+Use DI to add and configure the service to your liking, example:
+```csharp
+services.AddVippsEcommerceService(o => {
+	o.ApiUrl = "";
+	o.PrimarySubscriptionKey = "";
+	o.ClientSecret = "";
+	o.ClientId = "";
+});
+```
+
+See [VippsConfiguration.cs](https://github.com/ivarlovlie/IOL.VippsEcommerce/blob/master/src/IOL.VippsEcommerce/Models/VippsConfiguration.cs) for available properties.
+You can also use environment variables to configure the service, example:
+```csharp
+services.AddVippsEcommerceService(o => {
+	o.UseEnvironment = true;
+});
+```
+
+With the above example, the service will look for configuration values in the current environment using names specified in [VippsConfigurationKeyNames.cs](https://github.com/ivarlovlie/IOL.VippsEcommerce/blob/master/src/IOL.VippsEcommerce/Models/VippsConfigurationKeyNames.cs). The environment variable name for a given property is also specified in it's XML-documentation.
+
+
+## Caching
+
+The service can cache the credentials for api-access in a file with optional AES encryption, example:
+```csharp
+services.AddVippsEcommerceService(o => {
+	o.CacheEncryptionKey = "randomstring"; // optional
+	o.CredentialsCacheFilePath = "/tmp/vippsecom"; // path to directory that the executing process has write-access to
+});
+```
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