Allow custom init

Dockerfile

@@ -1,4 +1,4 @@
-FROM debian:12-slim
+FROM debian:13-slim
 
 
 # install useful packages
@@ -51,10 +51,8 @@ RUN set -eux; \
   echo 'gem: --no-document' >> /usr/local/etc/gemrc
 
 # install useful ruby gems
-RUN set -eux \
+RUN set -eux; \
   \
-  gem update --system \
-  ; \
   gem install -N \
   bundler \
   http \
@@ -63,3 +61,7 @@ RUN set -eux \
   redis \
   sequel \
   ;
+
+# run all scripts in /etc/console/init/boot.d
+RUN set -eux; \
+  test ! -d /etc/console/init/boot.d || find /etc/console/init/boot.d -maxdepth 1 -type f -exec bash {} \;

README.md

@@ -1,3 +1,52 @@
 # Console
 
 Simple console container, useful as a dev pod.
+
+To deploy in K8s, add the following manifest:
+
+```yaml
+apiVersion: apps/v1
+kind: Pod
+metadata:
+  name: console
+spec:
+  containers:
+    - name: console
+      image: ghcr.io/bsm/console/console:latest
+      imagePullPolicy: Always
+```
+
+To execute custom commands at boot time you can include custom init scripts into a
+`ConfigMap`. For example:
+
+```yaml
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: special-config
+  namespace: default
+data:
+  10-nproc.sh: |
+    #!/bin/bash
+
+    nproc > /tmp/NPROC
+---
+apiVersion: apps/v1
+kind: Pod
+metadata:
+  name: console
+  namespace: console
+spec:
+  containers:
+    - name: console
+      image: ghcr.io/bsm/console/console:latest
+      imagePullPolicy: Always
+      volumeMounts:
+        - mountPath: "/etc/console/init/boot.d"
+          name: bootd
+  volumes:
+    - name: bootd
+      configMap:
+        name: console-boot
+```