Docs: add quick start outline to README.md (#46)

Docs are not complete, but conceivably enough pieces are here to see what we're doing here and try it out.

README.md

@@ -45,6 +45,12 @@ Run the Corrosion agent on every node/host in the cluster. Other programs runnin
 
 The [Corrosion CLI](/doc/cli/README.md) provides commands for administration and access to database and features.
 
+### Quick start
+
+- [Prepare the Corrosion configuration file](config/README.md)
+- [Specify the initial database schema](schema.md)
+- [Start the Corrosion agent](cli/agent.md)
+
 See the WIP [Corrosion documentation](/doc/SUMMARY.md) for more details.
 
 ## Building Corrosion

doc/config/README.md

@@ -1 +1,11 @@
-# Configuration
+# Configuration
+
+Corrosion configuration lives in a TOML file. The default location is `/etc/corrosion/config.toml`.
+
+Configuration sections:
+- [db](db.md)
+- [gossip](gossip.md)
+- [api]() (to come)
+- [admin]() (to come)
+- [telemetry]() (to come)
+- [consul]() (to come)