chore: adds intro

web-docs/intro.md

@@ -2,7 +2,6 @@
 
 _flagd_ is a _feature flag evaluation engine_.
 Think of it as a ready-made, open source, OpenFeature-compliant feature flag backend system.
-It allows you to dynamically evaluate feature flags.
 
 With flagd you can:
 
@@ -11,8 +10,30 @@ With flagd you can:
 * use context-sensitive rules to target specific users or user-traits
 * perform pseudorandom assignments for experimentation
 * perform progressive roll-outs of new features
-* aggregate flag definitions from multiple sources 
+* aggregate flag definitions from multiple sources
 
 It doesn't include a UI, management console or a persistence layer.
 It's configurable entirely via a POSIX-style CLI.
 Thanks to it's minimalism, it's _extremely flexible_; you can leverage flagd as a sidecar alongside your application, an engine running in your application process, or as a central service evaluating thousands of flags per second.
+
+# How can deploy flagd?
+
+flagd is designed to fit well into a variety of infrastructures, and can run on various architectures.
+It run as a separate process or directly in your application.
+It's distributed as a binary, container image, and various libraries.
+If you're already leveraging containers in your infrastructure, you can extend the docker image with your required configuration.
+You can also run flagd as a service on a VM or a "bare-metal" host.
+If you'd prefer not to run an additional process at all, you can run the flagd evaluation engine directly in your application.
+No matter how you run flagd, you will need to supply it with feature flags.
+The flag definitions supplied to flagd (*sources*) are monitored for changes which will be immediately reflected in flagd's evaluations.
+Currently supported sources include files, HTTP endpoints, Kubernetes custom resources, and proto-compliant gRPC services.
+
+<!-- Should we add some simple diagrams here to illustrate the deployment options and sources? -->
+<!-- Do we want to add links here? or is there value in keeping this entirely self-contained to keep things focused? -->
+
+# How to I use flagd?
+
+flagd is fully OpenFeature compliant.
+To leverage it in your application you must use the OpenFeature SDK and flagd provider for your language.
+You can configure the provider to connect to a flagd instance you deployed earlier (evaluating flags over gRPC) or use the in-process evaluation engine to do flag evaluations directly in your application.
+Once you've configured the OpenFeature SDK, you can start evaluating the feature flags configured in your flagd definitions.