setup docker build

Dockerfile

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+FROM eclipse-temurin:21-jdk-alpine AS build
+
+WORKDIR /root/app
+
+# Download Gradle
+COPY ./gradle ./gradle
+COPY ./gradlew ./
+RUN ./gradlew --no-daemon --info --stacktrace
+
+# Download Dependencies
+COPY ./buildSrc ./buildSrc
+COPY ./settings.gradle.kts ./
+COPY ./bot-api/build.gradle.kts ./bot-api/
+COPY ./bot-database/build.gradle.kts ./bot-database/
+COPY ./management/build.gradle.kts ./management/
+COPY ./server/build.gradle.kts ./server/
+COPY ./bots/ping-bot/build.gradle.kts ./bots/ping-bot/
+COPY ./bots/pizza-bot/build.gradle.kts ./bots/pizza-bot/
+RUN ./gradlew deps --no-daemon --info --stacktrace
+
+# Build Application
+COPY . .
+RUN ./gradlew build :server:jlink --no-daemon --info --stacktrace
+
+FROM alpine:3.19.1
+
+WORKDIR /opt/chat/
+COPY --from=build /root/app/server/build/dist/jre /opt/chat/
+
+ENV JAVA_HOME="/opt/chat"
+ENV JAVA_OPTS="--enable-preview"
+ENV CHAT_BOT_CONFIG="file:/etc/chat/config.json"
+ENTRYPOINT $JAVA_HOME/bin/java $JAVA_OPTS --module eu.jonahbauer.chat.server