Rename //deploy -> //nix_gcr

I create //deploy when I first deployed a few applications that I
packaged with Nix. This was before I setup socrates as my "cloud". Now I
deploy all of my services using NixOS. The name "deploy" is a bit stale.
I'm renaming it //nix_gcr because it documents how I can deploy
Nix-packaged projects on Google Cloud Run.

nix_gcr/README.md

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+# Nix + Google Cloud Run (i.e. GCR)
+
+I'm documenting how I currently deploy projects that I package with Nix on
+Google Cloud Run.
+
+I'd like to automate this workflow as much as possible, and I intend to do just
+that. For now, I'm running things manually until I can design an generalization
+that appeals to me.
+
+## Dependencies
+- `nix-build`
+- `docker`
+- `gcloud`
+
+## Step-by-step
+
+1. Use `nix-build` to create our Docker image for Cloud Run.
+
+```shell
+> nix-build ./cloud_run.nix
+```
+
+This outputs a Docker image at `./result`.
+
+1. Load the built image (i.e. `./result`) into `docker` so that we can tag it
+   and push it to the Google Container Registry (i.e. GCR).
+
+```shell
+> sudo docker load <./result
+```
+
+1. (Optionally) Run the image locally to verify its integrity.
+
+```shell
+> sudo docker run -d -p 8080:4242 <name>:<tag>
+```
+
+1. Tag and push the image to GCR.
+
+```shell
+> sudo docker tag <name>:<label> gcr.io/<google-cloud-project-id>/<name>:<latest>
+```
+
+1. Visit Google Cloud Run; create a new service with "Create Service"; select
+   the uploaded Docker image from the "Container Image URL" field; click
+   "Create" to deploy.
+
+## Notes
+
+You may need to authorize `gcloud` by running the following:
+
+```shell
+> sudo gcloud auth login --no-launch-browser
+```
+
+You must use `sudo` here since the `docker` invocations are prefixed with `sudo`
+as well.
+
+## Todos
+
+- If possible, prefer using a command line tool like `gcloud` to create the
+  Cloud Run service.

nix_gcr/cloud_run.nix

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+{
+  pkgs ? import <nixpkgs> {},
+  depot ? import <depot> {},
+  ...
+}:
+
+pkgs.dockerTools.buildLayeredImage {
+  name = "gemma";
+  tag = "latest";
+  config.ExposedPorts = {
+    "4242" = {};
+  };
+  config.Env = [
+    "GEMMA_CONFIG=${./config.lisp}"
+  ];
+  config.Cmd = [ "${depot.fun.gemma}/bin/gemma" ];
+  maxLayers = 120;
+}

nix_gcr/config.lisp

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+;; 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)