Merge pull request 'docker file added' (#17) from get_connection into master

Reviewed-on: #17

Dockerfile

@@ -0,0 +1,15 @@
+FROM maven:3.6.3-openjdk-17-slim as BUILDER
+ARG VERSION=0.0.1-SNAPSHOT
+WORKDIR /build/
+COPY pom.xml /build/
+COPY src /build/src
+
+RUN mvn clean install
+COPY target/mailsender-${VERSION}.jar target/application.jar
+
+FROM java:21.0.2-jre-slim
+WORKDIR /app/
+
+COPY --from=BUILDER /build/target/application.jar /app/
+CMD java -jar /app/application.jar
+

pom.xml

@@ -61,7 +61,7 @@
 			<plugin>
 				<groupId>org.springframework.boot</groupId>
 				<artifactId>spring-boot-maven-plugin</artifactId>
-				<version>2.6.4</version>
+<!--				<version>2.6.4</version>-->
 				<configuration>
 					<excludes>
 						<exclude>