add dockerfile environment

Dockerfile

@@ -0,0 +1,9 @@
+FROM adoptopenjdk/openjdk11
+
+USER 1000
+
+VOLUME /config.json
+
+ENTRYPOINT ["/telegram_bot/bin/telegram_bot", "TOKEN"]
+
+ADD ./build/distributions/telegram_bot.tar /

Makefile

@@ -0,0 +1,19 @@
+#!make
+
+.ONESHELL:
+.PHONY:
+
+clean:
+	./gradlew clean
+
+build:
+	./gradlew build
+
+start:
+	./gradlew run
+
+startCompose:
+	docker-compose build && docker-compose up
+
+buildAndStartCompose:
+	make clean build startCompose

README.md

@@ -17,6 +17,13 @@ output you will get your bot information like:
 ExtendedBot(id=ChatId(chatId=1234567890), username=Username(username=@username_of_your_bot), firstName=Name of bot, lastName=, canJoinGroups=(some boolean), canReadAllGroupMessages=(some boolean), supportsInlineQueries=(some boolean))
 ```
 
+### Docker
+
+In this template there is template-like [docker-compose](docker-compose.yml) and [docker](Dockerfile) files. Besides,
+there is [Makefile](Makefile) and you may use something like `make buildAndStartCompose` to start your bot.
+
+It is important to replace `"TOKEN"` in [Dockerfile](Dockerfile) or remove and add some config as a volume.
+
 ## What next?
 
 There are several ways to continue:

build.gradle

@@ -28,3 +28,8 @@ dependencies {
 application {
     mainClassName = 'telegram_bot.AppKt'
 }
+
+java {
+    sourceCompatibility = JavaVersion.VERSION_11
+    targetCompatibility = JavaVersion.VERSION_11
+}

docker-compose.yml

@@ -0,0 +1,6 @@
+version: "3.4"
+
+services:
+  server:
+    build: .
+    restart: unless-stopped

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.3-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

src/main/kotlin/telegram_bot/App.kt

@@ -27,5 +27,9 @@ suspend fun main(args: Array<String>) {
             // simply reply :)
             reply(it, "Hello, I am ${me.firstName}")
         }
+
+        // That will be called on the end of bot initiation. After that prinln will be started long polling and bot will
+        // react on your commands
+        println(me)
     }.join()
 }