add configuration to use react-java-mysql sample with Docker Dev Environments feature

Signed-off-by: Guillaume Lours <guillaume.lours@docker.com>

react-java-mysql/backend/Dockerfile

@@ -1,3 +1,5 @@
+# syntax=docker/dockerfile:1.4
+
 FROM --platform=$BUILDPLATFORM maven:3.8.5-eclipse-temurin-17 AS builder
 WORKDIR /workdir/server
 COPY pom.xml /workdir/server/pom.xml
@@ -5,6 +7,24 @@ RUN mvn dependency:go-offline
 
 COPY src /workdir/server/src
 RUN mvn install
+
+FROM builder as dev-envs
+
+RUN <<EOF
+apt-get update
+apt-get install -y git
+EOF
+
+RUN <<EOF
+useradd -s /bin/bash -m vscode
+groupadd docker
+usermod -aG docker vscode
+EOF
+# install Docker tools (cli, buildx, compose)
+COPY --from=gloursdocker/docker / /
+CMD ["mvn", "spring-boot:run"]
+
+FROM builder as prepare-production
 RUN mkdir -p target/dependency
 WORKDIR /workdir/server/target/dependency
 RUN jar -xf ../*.jar
@@ -14,7 +34,7 @@ FROM eclipse-temurin:17-jre-focal
 EXPOSE 8080
 VOLUME /tmp
 ARG DEPENDENCY=/workdir/server/target/dependency
-COPY --from=builder ${DEPENDENCY}/BOOT-INF/lib /app/lib
-COPY --from=builder ${DEPENDENCY}/META-INF /app/META-INF
-COPY --from=builder ${DEPENDENCY}/BOOT-INF/classes /app
+COPY --from=prepare-production ${DEPENDENCY}/BOOT-INF/lib /app/lib
+COPY --from=prepare-production ${DEPENDENCY}/META-INF /app/META-INF
+COPY --from=prepare-production ${DEPENDENCY}/BOOT-INF/classes /app
 ENTRYPOINT ["java","-cp","app:app/lib/*","com.company.project.Application"]

react-java-mysql/backend/pom.xml

@@ -41,10 +41,6 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-data-jpa</artifactId>
         </dependency>
-        <dependency>
-            <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-starter-data-jpa</artifactId>
-        </dependency>
         <dependency>
             <groupId>mysql</groupId>
             <artifactId>mysql-connector-java</artifactId>