doc: add release instructions and general info (#22)

* doc: add release instructions and general info

* chore: update name in README

* chore: apply review suggestions

README.md

@@ -1,6 +1,9 @@
-# TeraBullet (Terasology Version)
+# JNBullet (Terasology Version)
 
-TeraBullet is a version of bullet with extensions for direct interactions for voxel worlds. Written for use with Terasology. this is an implementation of bullet wraps around native bullet using SWIG.
+_JNBullet is a version of [bullet](https://github.com/bulletphysics/bullet3) with extensions for direct interactions for voxel worlds, written for use with Terasology.
+Bullet is a real-time collision detection and multi-physics simulation, for instance intended for use in games.
+In Terasology we use it for simulating gravity for player and object movements as well as for collisions between players and/or objects.
+This is an implementation of bullet wrapped around native bullet using SWIG._
 
 ## Prerequisites
 
@@ -39,9 +42,62 @@ To build only the Java library part of bullet, simply run
 ./gradlew build
 ```
 
-## Publishing
+## Release Management
 
-...
+A _release_ denotes that an artifact for the associated commit is available for consumption. Our
+[GitHub action](https://github.com/MovingBlocks/JNBullet/actions) automatically builds and publishes releases for the main `master` branch.
+The artifact is published to our [Artifactory] under the version specified in [`gradle.properties`](./gradle.properties).
+
+> ⚠ **Note:** Whether an artifact should be published as release or snapshot is determined by whether or not there is a
+> `-SNAPSHOT` in the version. Publishing will fail in case publishing the same non-snapshot version is attempted
+> again.
+
+The exact build steps for this library are defined in the [GitHub action workflow](./.github/workflows/allInOne.yml).
+
+🗄 [**Snapshots**](https://artifactory.terasology.io/ui/repos/tree/General/libs-snapshot-local/org/terasology/jnbullet) ▪ [**Releases**](https://artifactory.terasology.io/ui/repos/tree/General/libs-release-local/org/terasology/jnbullet)
+
+### Release Process
+
+As releases are automatically triggered from `master` the required steps to make a 
+non-snapshot release for any version is as follows:
+
+1. **Decide on release version** ▪ Which branch to publish, under which version?
+
+    _The version number MUST be a higher SemVer than the current version of the branch to release.
+     The version bump SHOULD follow SemVer specifications, e.g., increase the major version for breaking changes, or do
+     a patch release for bug fixes._
+
+1. **Make the release commit** ▪ Trigger a release via the [GitHub Action]
+
+    _Update the version in [gradle.properties](./gradle.properties) and remove the `-SNAPSHOT` suffix. Commit the change with the
+     following message and push it:_
+
+    > `release: version {{version}}`
+
+    _Until we have automatic tagging or a tag-based release process it is recommended to manually
+     [create and push an annotated tag][git-tag] for the respective version on `master`. For a library release v1.2.3
+     the tag process is:_
+
+    ```sh
+    git tag -a v1.2.3 -m "Release version 1.2.3"
+    git push --tags
+    ```
+
+1. **Prepare for next release** ▪ Bump to next snapshot version
+
+    _Next, we have to increase the version number to be able to get pre-release `-SNAPSHOT` builds for subsequent 
+     commits. Therefore, the version number MUST be a higher SemVer than the version just released. This will typically
+     be a minor version bump. To do this, just update the version in [gradle.properties](./gradle.properties), commit the 
+     change with the following message and push it:_
+
+    > `chore: prepare next snapshot for {{version}}`
+
+1. **Make the release visible** ▪ Create the GitHub Release
+
+    _Finally, we need to create the GitHub release to make the new release visible.
+     Navigate to [JNBullet Releases](https://github.com/MovingBlocks/JNBullet/releases) and "Draft a new release".
+     Select the tag you created earlier and name the release as "v{{version}}", optionally with a descriptive suffix like " - Initial Release".
+     "Generate release notes" to have GitHub automatically add a list of new changes and contributors since the last release and publish the release._
 
 ## Testing