Added Docker support (#15)

* Added Docker dependency in pom.xml. Added Dockerfile, docker-compose properties, and added .env to gitignore.

* Resolved issues with empty lines

Dockerfile

@@ -0,0 +1,16 @@
+# Builder stage
+FROM openjdk:21-jdk-slim as builder
+WORKDIR application
+ARG JAR_FILE=target/*.jar
+COPY ${JAR_FILE} application.jar
+RUN java -Djarmode=layertools -jar application.jar extract
+
+# Final stage
+FROM openjdk:21-jdk-slim
+WORKDIR application
+COPY --from=builder application/dependencies/ ./
+COPY --from=builder application/spring-boot-loader/ ./
+COPY --from=builder application/snapshot-dependencies/ ./
+COPY --from=builder application/application/ ./
+ENTRYPOINT ["java", "org.springframework.boot.loader.launch.JarLauncher"]
+EXPOSE 8080

docker-compose.yml

@@ -0,0 +1,34 @@
+version: "3.8"
+
+services:
+  mysqldb:
+    image: mysql:8
+    restart: always
+    environment:
+      MYSQL_ROOT_PASSWORD: ${MYSQL_ROOT_PASSWORD}
+      MYSQL_DATABASE: ${MYSQL_DATABASE}
+    ports:
+      - "${MYSQL_LOCAL_PORT}:${MYSQL_DOCKER_PORT}"
+    healthcheck:
+      test: ["CMD-SHELL", "mysqladmin ping -h localhost -P ${MYSQL_DOCKER_PORT} -u ${MYSQL_USER} -p${MYSQL_ROOT_PASSWORD}"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+
+  app:
+    depends_on:
+      mysqldb:
+        condition: service_healthy
+    image: book-service
+    build: .
+    ports:
+      - "${SPRING_LOCAL_PORT}:${SPRING_DOCKER_PORT}"
+      - "${DEBUG_PORT}:${DEBUG_PORT}"
+    environment:
+      SPRING_APPLICATION_JSON: '{
+      "spring.datasource.url": "jdbc:mysql://mysqldb:${MYSQL_DOCKER_PORT}/${MYSQL_DATABASE}?serverTimezone=UTC",
+      "spring.datasource.username": "${MYSQL_USER}", 
+      "spring.datasource.password": "${MYSQL_ROOT_PASSWORD}", 
+      "jwt.secret": "${JWT_SECRET}"
+      }'
+      JAVA_TOOL_OPTIONS: "-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=*:5005"

pom.xml

@@ -109,8 +109,11 @@
             <artifactId>jjwt-jackson</artifactId>
             <version>0.12.5</version>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-docker-compose</artifactId>
+        </dependency>
     </dependencies>
-
     <build>
         <plugins>
             <plugin>

src/main/resources/application.properties

@@ -10,5 +10,5 @@ spring.jpa.open-in-view=false
 
 server.servlet.context-path=/api
 
-jwt.expiration=300000
+jwt.expiration=30000000
 jwt.secret=${JWT_SECRET}