Package depot's gemma as a docker image for Cloud Run

Using <depot>'s gemma project with `dockerTools.buildLayeredImage` because I
need access to a nix-packaged server and gemma is the first thing that comes to
mind.

docker/cloud_run.nix

@@ -1,9 +1,18 @@
-# Attempting to build a Docker image with Nix to run using Google Cloud Run.
-{ pkgs ? import <nixpkgs> {}, ... }:
+{
+  pkgs ? import <nixpkgs> {},
+  depot ? import <depot> {},
+  ...
+}:
 
 pkgs.dockerTools.buildLayeredImage {
-  name = "mysql";
+  name = "gemma";
   tag = "latest";
-  config.Cmd = [ "${pkgs.mysql}/bin/mysqld" ];
+  config.ExposedPorts = {
+    "4242" = {};
+  };
+  config.Env = [
+    "GEMMA_CONFIG=${./config.lisp}"
+  ];
+  config.Cmd = [ "${depot.fun.gemma}/bin/gemma" ];
   maxLayers = 120;
 }

docker/config.lisp

@@ -0,0 +1,21 @@
+;; Example configuration file for Gemma
+
+(config :port 4242
+        :data-dir "/tmp/gemma/")
+
+(deftask bathroom/wipe-mirror 7)
+(deftask bathroom/wipe-counter 7)
+
+;; Bedroom tasks
+(deftask bedroom/change-sheets 7)
+(deftask bedroom/vacuum 10)
+
+;; Kitchen tasks
+(deftask kitchen/normal-trash 3)
+(deftask kitchen/green-trash 5)
+(deftask kitchen/blue-trash 5)
+(deftask kitchen/wipe-counters 3)
+(deftask kitchen/vacuum 5 "Kitchen has more crumbs and such!")
+
+;; Entire place
+(deftask clean-windows 60)