Remove outdated README content (fixes #178)

README.md

@@ -8,15 +8,11 @@ Server for stable, curated Haskell package sets
 This repo is part of the [Stackage project](https://github.com/fpco/stackage),
 and the live server can be viewed at https://www.stackage.org.
 
-Inside the config directory, there are two files ending in `-sample`. They
-should be copied to remove the `-sample` suffix for the site to work. We do it
-this way to avoid accidentally committing real database credentials into the
-Git repository.
-
 Running the server will automatically download an SQLite3 database from S3
-containing package metadata and snapshot information. Note that this is unlike
-previous versions of this codebase, that stored that information in PostgreSQL,
-and required that local development uploaded its own snapshots.
+containing package metadata and snapshot information.  The SQLite3 database is
+generated by the `stackage-server-cron` executable in this repository.
+
+You can run this site with `yesod devel`, e.g.:
 
-The SQLite3 database is generated by the `stackage-server-cron` executable in
-this repository.
+    stack --install-ghc build yesod-bin
+    stack exec -- yesod devel