Add GitHub Packages publish workflow (#9)

Author: Mark Whitaker

.github/workflows/deploy-to-github-packages.yml

@@ -0,0 +1,10 @@
+name: Publish to GitHub Packages
+on:
+  release:
+    types: [published]
+
+jobs:
+  publish-to-nuget:
+    name: Publish release to GitHub Packages
+    uses: markwhitaker/shared-workflows/.github/workflows/gradle-publish-to-github-packages.yml@main
+    secrets: inherit

build.gradle

@@ -5,6 +5,7 @@ buildscript {
 plugins {
     id 'java-library'
     id 'com.palantir.git-version' version '0.15.0'
+    id 'maven-publish'
 }
 
 repositories {
@@ -19,3 +20,21 @@ sourceCompatibility = JavaVersion.VERSION_1_8
 dependencies {
     testImplementation "junit:junit:$junit_version"
 }
+
+publishing {
+    repositories {
+        maven {
+            name = "GitHubPackages"
+            url = uri("https://maven.pkg.github.com/markwhitaker/mimetypes.java")
+            credentials {
+                username = project.findProperty("gpr.user") ?: System.getenv("USERNAME")
+                password = project.findProperty("gpr.key") ?: System.getenv("TOKEN")
+            }
+        }
+    }
+    publications {
+        gpr(MavenPublication) {
+            from(components.java)
+        }
+    }
+}