README.org: Add section about local image usage; cleanup

README.org

@@ -46,6 +46,21 @@ Alternatively, ~./shell.sh~ can be invoked directly
 
 ~build~ is optional, as its the default target.
 
+* Testing and using the image locally
+
+The easiest way to use and test the guix-builder container image is to use the provide make
+target.
+
+#+begin_src shell
+  make run
+#+end_src
+
+Or, if you want to run in a container with no guix store mounted.
+
+#+begin_src shell
+  make run-no-store
+#+end_src
+
 * Using the image
 
 Now that the OCI image has been produced, some care must be taken when running it. Namely,
@@ -73,14 +88,13 @@ not required.
   docker run --rm -it \
    -v /var/guix/daemon-socket/socket:/var/guix/daemon-socket/socket \
    -v /gnu/store:/gnu/store:ro \
-   -v /etc/ssl:/etc/ssl:ro \
    -v /var/lib/ci/guix-cache:/tmp/.cache/guix \
    -e HOME=/tmp \
    -w /tmp \
    guix-builder:latest
 #+end_src
 
-** Using the image with DroneCI / WoodpeckerCI
+** Using the image with Gitea/Forgejo actions or DroneCI/WoodpeckerCI
 
 The primary use-case for the image produced by this repository is for ci/cd jobs (mandatorily
 on a host that is running guix-daemon itself). This allows for the hosts guix store to be
@@ -90,29 +104,11 @@ times.
 Any ci/cd tool that can run OCI containers should be compatible with this image, though the
 optimal setup assumes it provides a mechanism to mount volumes and set environment variables
 (by an administrator). Both DroneCI and WoodpeckerCI allow for this, using
-~DRONE_RUNNER_VOLUMES~ and ~WOODPECKER_BACKEND_DOCKER_VOLUMES~ respectively.
+~DRONE_RUNNER_VOLUMES~ and ~WOODPECKER_BACKEND_DOCKER_VOLUMES~ respectively. Gitea/Forgejo
+actions allow it via the ~container.options~ configuration value.
 
 Note, in WoodpeckerCI, this functionality has not yet made it into a release (see [[https://github.com/woodpecker-ci/woodpecker/pull/1203][PR]]).
 
-Below is an example of running ~drone-runner-docker~, setup to spawn ~guix~ images produced
-by this repository:
-
-#+begin_src shell
-  docker run -d \
-    -v /var/run/docker.sock:/var/run/docker.sock \
-    -e DRONE_RPC_PROTO="https" \
-    -e DRONE_RPC_HOST="<REDACTED>" \
-    -e DRONE_RPC_SECRET="<REDACTED>" \
-    -e DRONE_RUNNER_CAPACITY=4 \
-    -e DRONE_RUNNER_NAME="<REDACTED>" \
-    -e DRONE_RUNNER_LABELS=guix:on \
-    -e DRONE_RUNNER_VOLUMES=/var/guix/daemon-socket/socket:/var/guix/daemon-socket/socket,/gnu/store:/gnu/store,/var/lib/ci/guix-cache:/.cache/guix \
-    -p 3001:3000 \
-    --restart unless-stopped \
-    --name runner-guix \
-    drone/drone-runner-docker:1.6.3
-#+end_src
-
 * FAQ
 
 ** Why not produce this image with ~guix pack -f docker ...~ directly?