Add documentation about publishing a new release version

DEPLOYMENT.md

@@ -1,5 +1,56 @@
-Follow https://central.sonatype.org/pages/apache-maven.html
+# Deploying of new release version
 
+To release a new version, you need manually publish it to maven repository (Maven Central). This requires the following steps:
+
+1. Set up and configure GPG key for generating a signature. See this [guide](https://central.sonatype.org/pages/working-with-pgp-signatures.html) 
+for more information.
+   2. Install GnuPG or jump to the next point. 
+   3. Using `gpg --list-signatures` check if you have a key. If not, generate one using `gpg --gen-key`.
+   4. During creation process, you will need to create a passphrase. This passphrase and your private key are all that 
+   is needed to sign artifacts with your signature.
+   2. Don't forget to add your public key to the [key server](https://central.sonatype.org/publish/requirements/gpg/#gpg-signed-components) 
+   so that others can verify your signature.
+   3. Set environment variable `GPG_TTY`:
+   ```
+   export GPG_TTY=$(tty)
+   ```
+2. Configure account details to deploy to OSSRH
+   3. Find the configuration file for Maven - `settings.xml` file. It is located either in `~/.m2/settings.xml` 
+   (single user configuration) or in `/opt/homebrew/Cellar/maven/[version]/libexec/conf` (configuration for all Maven users on a machine).
+   4. Add the pb Jira Sonatype account credentials to the `settings.xml`:
+    ```xml
+    <settings>
+      <servers>
+        <server>
+          <id>ossrh</id>
+          <username>Engineering</username>
+          <password>[password from 1Password - look for "Stargate Sonatype" item]</password>
+        </server>
+      </servers>
+    </settings>
+    ```
+   5. Add GPG passphrase to the `settings.xml`:
+   ```xml
+   <settings>
+     <profiles>
+       <profile>
+         <id>ossrh</id>
+         <properties>
+           <gpg.passphrase>[passphrase]</gpg.passphrase>
+         </properties>
+       </profile>
+     </profiles>
+   </settings>
+   ```
+3. And finally publish the new version:
 ```
 mvn clean deploy
 ```
+
+4. Check that new version is available in [Maven central](https://central.sonatype.com/artifact/io.github.productboardlabs/jackson-kafka-avro-serializer/overview) 
+(publishing may take a few minutes).
+
+
+Follow this [guide](https://central.sonatype.org/pages/apache-maven.htmlguide) for more information.
+
+

README.md

@@ -64,6 +64,9 @@ implementation("io.github.productboardlabs:jackson-kafka-avro-serializer:0.7.1")
  - Support for use latest version flag 
  - Do not use deprecated methods from Kafka Avro serializer
 
+# Deploying of new release version
+
+To deploy a new release version to Maven Central, follow the [following guide](DEPLOYMENT.md).
 
 # Release notes