diff --git a/Dockerfile b/Dockerfile
index 0d07ffd..22148e0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,6 +2,7 @@ FROM phusion/baseimage:0.11
 
 VOLUME /var/mirror
 
+ENV MIRROR_INTERVAL_SECONDS 43200
 ENV MIRROR_ARCHITECTURES amd64
 ENV UBUNTU_SOURCE_MIRROR
 ENV MIRROR_CATEGORIES main,universe,restricted,multiverse
diff --git a/README.markdown b/README.markdown
index 4c43968..e190b0f 100644
--- a/README.markdown
+++ b/README.markdown
@@ -1,36 +1,41 @@
 # sneak/ubuntumirror
 
-Docker container for syncing bionic ubuntu LTS mirrors
-to reduce network traffic and speed up build times.
+Docker image for syncing ubuntu LTS mirrors to reduce network traffic and
+speed up build times.
 
-Then even your builds (where you can't specify links) will go fast.
+Then even your builds (where you can't specify links to other containers by
+hostname) will go fast.
 
 # Levers
 
+## Environment Variables
+
 * `MIRROR_ARCHITECTURES`
-    * default `amd64`. 
+    * default `amd64`.
     * You may want `i386,amd64`.
 * `MIRROR_CATEGORIES`
-    * default `main,universe`.
-    * You may want `main,universe,restricted,multiverse`. Will use lots of
-      disk.
+    * Default `main,universe,restricted,multiverse`. Will use lots of disk.
+    * You may want `main,universe`.
 * `UBUNTU_MIRROR_PROJECTS`
-    * default `xenial,xenial-updates,xenial-security,xenial-backports,bionic,bionic-updates,bionic-security,bionic-backports`.
-* `UBUNTU_MIRROR_SOURCE`
+    * Default
+      `bionic,bionic-updates,bionic-security,bionic-backports,focal,focal-updates,focal-security,focal-backports`.
+    * You may want only `focal,focal-updates,focal-security,focal-backports`.
+* `UBUNTU_MIRROR_SOURCE` - upstream server to mirror from
     * default `archive.ubuntu.com`.
     * You may want `xx.archive.ubuntu.com` (where `xx` is your country
       code).
-* `MIRROR_INTERVAL_SECONDS` - mirror sync interval
+* `UBUNTU_SOURCE_MIRROR` - do we want to mirror all the source code too?
+    * Default ``
+    * You may want `1` if you want to use up even more disk for your mirror
+* `MIRROR_INTERVAL_SECONDS` - mirror update interval
     * default `43200` (12h)
     * You may want `10800` (3h)
 
-# Example dnsmasq setup
+# Example CapRover Definition File
 
 ```
-apt update && apt -y install dnsmasq
-echo address=/mirrors.ubuntu.com/172.17.0.1 > /etc/dnsmasq.d/ubuntu-mirror-local
+ {
+  "schemaVersion": 2,
+  "imageName": "sneak/ubuntumirror:latest"
+}
 ```
-
-Then, just add `--dns 172.17.0.1` to your /etc/default/docker opts
-and bounce the docker daemon.  Future containers will talk to your local
-mirror.
diff --git a/mirror.run b/mirror.run
index 4a691b5..c0adc3a 100644
--- a/mirror.run
+++ b/mirror.run
@@ -6,8 +6,8 @@ export HOME=/root
 # cleanup previous runs
 rm -rf /var/mirror/ubuntu/.temp
 
-while true ; do
+while sleep 1 ; do
     cd /opt/mirror && make
 
-    sleep ${MIRROR_INTERVAL_SECONDS:-43200}
+    sleep ${MIRROR_INTERVAL_SECONDS}
 done