Add release document

RELEASE.md

@@ -0,0 +1,34 @@
+## How to release
+
+Use username/password of sonatype https://s01.oss.sonatype.org/ 
+
+```shell
+MAVEN_USERNAME={} MAVEN_PASSWORD={} ./gradlew build publish
+```
+
+## Generate gpg key
+
+Generate gpg key with name and email
+
+```shell
+ gpg --gen-key 
+```
+
+Export keyring
+
+```shell
+ gpg --keyring secring.gpg --export-secret-keys > ~/.gnupg/secring.gpg
+```
+
+## Gradle properties
+
+Gradle properties should looks something like
+
+```shell
+$ cat ~/.gradle/gradle.properties
+
+signing.keyId=5DBFACD8
+signing.password={passphrase}
+signing.secretKeyRingFile=//Users/jsalinas/.gnupg/secring.gpg 
+```
+

build.gradle

@@ -93,6 +93,4 @@ subprojects {
   signing {
     sign publishing.publications.MyPublication
   }
-
 }
-