chore(doc): add doc deploy instructions

Author: nickkkccc

DOC_DEPLOY.md

@@ -0,0 +1,34 @@
+# Documentation deploy process for Tarantool Java SDK
+
+The Tarantool Java SDK documentation is located on the GitHub pages. The link can be found on the
+main page of the repository.
+
+The documentation is deploying under two different scenarios:
+
+1. `dev` - unreleased documentation. These documents contain all the information about capabilities
+   and features of the Tarantool Java SDK that have not yet been released (tag). This includes
+   information about any innovations and opportunities currently under development. **Information is
+   subject to change and may not be accurate until next release.**
+2. `X.Y.*` is the release version of the documentation. Here is the released information about
+   capabilities and features of the Tarantool Java SDK that are specific to a particular release.
+   Not here contains information about innovations that go beyond the scope of this release.
+   Information in documentation **can be supplemented, clarified and revised only about those
+   recorded in this release capabilities**. Also, information **can be corrected if errors are
+   found in the text documentation**.
+
+## Documentation deploy process
+
+### Dev documentation
+
+`dev-documentation` is deployed every time changes from branches are pushed to master
+`master` branch.
+
+### Release documentation
+
+Release documentation is deployed manually. In order to deploy documentation for a specific
+*major-minor** version of the Tarantool Java SDK, follow these steps:
+
+* Go to the `Actions` section and select `release-documentation` workflow
+* Click **Run workflow** and select the required tag (`Run workflow` → `Tags`)
+* **(Only for tags _1.5.x_ and _1.6.x_)** Select tag `1.6.0` and enter the required tag, e.x. 
+  `1.5.101` (this is necessary because these tags work on the old compatible workflow)

README.md

@@ -24,3 +24,4 @@ You need to download and install the library according to the [instructions](INS
 ## Documentation
 
 - [Release](RELEASING.md)
+- [Documentation deploy](DOC_DEPLOY.md)