Include some barebones documentation

config/config.example.json

@@ -1 +1,9 @@
-{}
+{
+    "db": {
+        "host": "postgres",
+        "password": "correcthorse"
+    },
+    "web": {
+        "port": 8080
+    }
+}

readme.md

@@ -0,0 +1,6 @@
+# Archery
+## Build system for pacman
+
+Quickly trigger build jobs on a remote system (perhaps one with more RAM?) for debugging packaging issues. Switch between Artix and Arch to compare builds. Enable testing or staging repos in a single click.
+
+Consult [docker-compose.yml](docker-compose.yml) and [config.example.json](config/config.example.json) to get an understanding of how to deploy Archery.