build: bump Dockerfile to use java 21 and gradle 8.12

Dockerfile

@@ -1,15 +1,31 @@
-# Build Rainbow jar
-FROM gradle:8.5-alpine AS build
+#
+# Build Rainbow API jar
+#
+FROM gradle:8.12.0-jdk21-alpine AS build
 
-COPY --chown=gradle:gradle . /home/gradle/src
-WORKDIR /home/gradle/src
+WORKDIR /home/gradle
+COPY --chown=gradle:gradle build.gradle src/ /home/gradle/src/
+COPY --chown=gradle:gradle build.gradle settings.gradle /home/gradle/
 
 RUN gradle build --no-daemon  # no daemon since building only once
 
+#
 # Launch Rainbow API
-FROM openjdk:17-jdk-slim AS start
+#
+FROM eclipse-temurin:21-alpine AS runtime
 
-RUN mkdir /src
-COPY --from=build /home/gradle/src/build/libs/rainbow-1.0.0.jar /src/rainbow-1.0.0.jar
+ARG API_NAME=rainbow-api
+ARG API_VERSION=1.1.0
 
-ENTRYPOINT ["java","-jar","/src/rainbow-1.0.0.jar"]
+LABEL name=$API_NAME \
+      version=$API_VERSION \
+      author="Derek Garcia" \
+      description="API service to navigate and search courses available at the University of Hawaii"
+
+RUN adduser -D rainbow
+
+WORKDIR /rainbow
+COPY --from=build --chown=rainbow:rainbow /home/gradle/build/libs/$API_NAME-$API_VERSION.jar /rainbow/rainbow.jar
+
+USER rainbow
+ENTRYPOINT ["java","-jar","rainbow.jar"]

bootstrap.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+# Parse version from properties
+VERSION="1.1.0"
+
+# Build jar
+echo "Building jar. . ."
+./gradlew -q clean bootJar
+
+# Launch jar
+echo "Done! Launching api. . ."
+java -jar ./build/libs/rainbow-${VERSION}.jar

readme.md

@@ -31,7 +31,7 @@ gradle bootJar    # via Gradle
 ./gradlew bootJar # or via Gradle Wrapper
 
 # Run Jar
-java -jar ./build/libs/rainbow-1.0.0.jar
+java -jar ./build/libs/rainbow-1.1.0.jar
 ```
 
 ### Docker