explain where docs are

keep netlify config for now (disabled in the app), but only make it ship the _redirects file
add rule for 'install.sh'
move _redirects file into docs/ directory
document redirects and Netlify

Signed-off-by: Daniel Holbach <daniel@weave.works>

docs/README.md

@@ -0,0 +1,17 @@
+# Flux v2 Documentation
+
+The documentation for `flux2` has moved to this repository: <https://github.com/fluxcd/website>.
+
+[The Website's README](https://github.com/fluxcd/website/#readme) has information on how to
+
+- modify and extend documentation
+- run the site <https://fluxcd.io> locally
+- publish changes
+
+and where all the individual pieces of content come from.
+
+It will be easier for us to maintain a coherent web presences (and merge all of Flux documentation) in one central repository. This was partly discussed in <https://github.com/fluxcd/flux2/discussions/367>.
+
+## toolkit.fluxcd.io
+
+For historical reasons we are keeping a `_redirects` file in this directory. It defines how redirects from the old site `toolkit.fluxcd.io` to our new website <https://fluxcd.io> work. Changes to this file need to be merged and a manual build triggered in the Netlify App.

docs/_redirects

@@ -0,0 +1,18 @@
+# individual rules
+/core-concepts          https://fluxcd.io/docs/concepts                     301!
+/contributing           https://fluxcd.io/contributing                      301!
+/install.sh             https://fluxcd.io/install.sh                        301!
+
+# refer to https://github.com/fluxcd/flux2/discussions/367
+/dev-guides/*           https://fluxcd.io/docs/gitops-toolkit/:splat        301!
+
+
+# this is how things looked in the navbar anyway..?
+/guides/faq-migration                   https://fluxcd.io/docs/migration/faq-migration                  301!
+/guides/flux-v1-automation-migration    https://fluxcd.io/docs/migration/flux-v1-automation-migration   301!
+/guides/flux-v1-migration               https://fluxcd.io/docs/migration/flux-v1-migration              301!
+/guides/helm-operator-migration         https://fluxcd.io/docs/migration/helm-operator-migration        301!
+
+
+# catch all
+/*                      https://fluxcd.io/docs/:splat                       301!