Added heroku button

Procfile

@@ -0,0 +1 @@
+web: java $JAVA_OPTS -jar sample-spring-boot-echo/build/libs/sample-spring-boot-echo-*.jar --server.port=$PORT

README.md

@@ -110,7 +110,7 @@ This project contains following modules:
 
 There's some sample projects:
 
- * sample-spring-boot-echo: Simple echo server.
+ * sample-spring-boot-echo: Simple echo server. There's heroku button.
  * sample-spring-boot-kitchensink: Full featured sample code.
 
 ## Requirements

app.json

@@ -0,0 +1,15 @@
+{
+    "name": "echo bot - LINE Messaging API",
+    "description": "This is a sample application for LINE Messaging API",
+    "keywords": ["chatbot", "line", "java"],
+    "env": {
+        "LINE_BOT_CHANNEL_TOKEN": {
+            "description": "LINE Bot channel access token from LINE Developers",
+            "required":  true
+        },
+        "LINE_BOT_CHANNEL_SECRET": {
+            "description": "LINE Bot channel secret from LINE Developers",
+            "required":  true
+        }
+    }
+} 

build.gradle

@@ -61,7 +61,12 @@ subprojects {
     apply plugin: 'propdeps-eclipse'
     apply plugin: 'findbugs'
     apply plugin: 'java'
-    apply plugin: 'com.gorylenko.gradle-git-properties'
+    if (new File("${project.rootDir}/.git").exists()) {
+        println("There's .git directory")
+        apply plugin: 'com.gorylenko.gradle-git-properties'
+    } else {
+        println("There's no .git directory.");
+    }
     apply plugin: 'io.spring.dependency-management'
 
     sourceCompatibility = 1.8
@@ -109,14 +114,20 @@ subprojects {
         }
     }
 
-    task javadocJar(type: Jar) {
-        classifier = 'javadoc'
-        from "${buildDir}/javadoc"
-    }
+    if (!project.name.startsWith('sample-')) {
+        task javadocJar(type: Jar) {
+            classifier = 'javadoc'
+            from "${buildDir}/javadoc"
+        }
+
+        task sourcesJar(type: Jar) {
+            classifier = 'sources'
+            from sourceSets.main.allSource
+        }
 
-    task sourcesJar(type: Jar) {
-        classifier = 'sources'
-        from sourceSets.main.allSource
+        artifacts {
+            archives javadocJar, sourcesJar
+        }
     }
 
     compileJava {
@@ -127,10 +138,6 @@ subprojects {
         }
     }
 
-    artifacts {
-        archives javadocJar, sourcesJar
-    }
-
     project.plugins.withType(org.springframework.boot.gradle.plugin.SpringBootPlugin) {
         bootRun {
             systemProperties System.properties

sample-spring-boot-echo/README.md

@@ -9,7 +9,42 @@ You can run this sample bot via gradle.
     ../gradlew bootRun -Dline.bot.channelToken=YOUR_CHANNEL_TOKEN \
                        -Dline.bot.channelSecret=YOUR_CHANNEL_SECRET
 
- You need to path following 2 options.
+You need to pass following 2 options.
 
   * line.bot.channelToken: Your channel access token
   * line.bot.channelSecret: Your channel secret
+
+## Deploy on heroku
+
+You can deploy this module on heroku.
+
+### Step 1
+
+You need to get channel access token and channel secret from LINE Developers.
+
+<img src="https://github.com/line/line-bot-sdk-java/blob/heroku/sample-spring-boot-echo/_assets/line-bot-configuration.png?raw=true">
+
+### Step 2
+
+Tap deploy button.
+
+[![Deploy](https://www.herokucdn.com/deploy/button.svg)](https://heroku.com/deploy)
+
+### Step 3
+
+Fill form and run your own instance.
+
+<img src="https://github.com/line/line-bot-sdk-java/blob/heroku/sample-spring-boot-echo/_assets/heroku.png?raw=true">
+
+Then, tap "Manage app" button and take your heroku instance's name.
+
+<img src="https://github.com/line/line-bot-sdk-java/blob/heroku/sample-spring-boot-echo/_assets/heroku-app-name.png?raw=true">
+
+### Step 4
+
+Put webhoook URL on LINE developers.
+
+Your webhook URL is: `https://${YOUR_HEROKU_APP_NAME}.herokuapp.com/callback`
+
+<img src="https://github.com/line/line-bot-sdk-java/blob/heroku/sample-spring-boot-echo/_assets/put-webhook-url.png?raw=true">
+

system.properties

@@ -0,0 +1 @@
+java.runtime.version=1.8