chore: update DEVREADME

Signed-off-by: Jason C. Leach <[email protected]>

.devcontainer/devcontainer.env

@@ -2,3 +2,6 @@
 # Any environment variables that the container needs
 # go in here.
 #
+# Example(s)
+# GENESIS_TXN_PATH=network/genesis/local-genesis.txn
+#

DEVREADME.md

@@ -2,6 +2,12 @@
 
 This file is intended for developers working on the internals of the framework. If you're just looking how to get started with the framework, see the [docs](./docs)
 
+# Environment Setup
+
+## VSCode devContainer
+
+This project comes with a [.devcontainer](./devcontainer) to make it as easy as possible to setup your dev environment and begin contributing to this project. All the [environment variables](https://code.visualstudio.com/remote/advancedcontainers/environment-variables) noted below can be added to [devcontainer.env](./devcontainer.env) and exposed to the development docker container.
+
 ## Running tests
 
 Test are executed using jest. Some test require either the **mediator agents** or the **ledger** to be running. When running tests that require a connection to the ledger pool, you need to set the `TEST_AGENT_PUBLIC_DID_SEED` and `GENESIS_TXN_PATH` environment variables.