Fix docker startup so that it works properly with stdio mode. Probably worthwhile to toss majority of this readme, less confusing

nats-server.conf

@@ -0,0 +1,12 @@
+port: 4222
+
+jetstream {
+    store_dir: /var/lib/nats/jetstream
+    max_memory_store: 1GB
+    max_file_store: 10GB
+}
+
+http_port: 8222
+log_file: "/var/log/nats-server.log"
+debug: false
+trace: false