Added MAINTAINERS doc

Author: ewoutp

MAINTAINERS.md

@@ -0,0 +1,53 @@
+# Maintainer Instructions
+
+## Running tests
+
+To run the entire test set, run:
+
+```bash
+export DOCKERNAMESPACE=<your docker hub account>
+make clean
+make build
+make run-tests
+```
+
+## Preparing a release
+
+To prepare for a release, do the following:
+
+- Make sure all tests are OK.
+
+## Building a release
+
+To make a release you must have:
+
+- A github access token in `~/.arangodb/github-token` that has read/write access
+  for this repository.
+- Push permission for the current docker account (`docker login <your-docker-hub-account>`)
+  for the `arangodb` docker hub namespace.
+- The latest checked out `master` branch of this repository.
+
+```bash
+make release-patch
+# or
+make release-minor
+# or
+make release-major
+```
+
+If successful, a new version will be:
+
+- Build docker images, yaml resources & helm charts.
+- Tagged in github
+- Uploaded as github release
+- Pushed as docker image to docker hub
+- `./VERSION` will be updated to a `+git` version (after the release process)
+
+If the release process fails, it may leave:
+
+- `./VERSION` uncommitted. To resolve, checkout `master` or edit it to
+  the original value and commit to master.
+- A git tag named `<major>.<minor>.<patch>` in your repository.
+  To resolve remove it using `git tag -d ...`.
+- A git tag named `<major>.<minor>.<patch>` in this repository in github.
+  To resolve remove it manually.