added Dockerfile

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

Dockerfile

@@ -0,0 +1,22 @@
+FROM alpine AS build
+RUN apk update \
+ && apk add openjdk21-jre
+RUN apk add bash clang-extra-tools git
+ADD . /LightOidc
+WORKDIR /LightOidc
+RUN VERSION=$(clang-format --version | sed -e "s/.* //g") \
+ && sed -i "s|clangFormat(.*).style|clangFormat('$VERSION').style|g" build.gradle \
+ && ./gradlew jar \
+ && mv *app/build/libs/*.jar /lightoidc.jar
+
+FROM alpine
+RUN apk update \
+ && apk add openjdk21-jre
+COPY --from=build /lightoidc.jar /opt/lightoidc.jar
+RUN adduser -S lightoidc \
+ && mkdir /data /home/lightoidc/.config \
+ && chown lightoidc /data /home/lightoidc/.config \
+ && ln -s /data /home/lightoidc/.config/LightOIDC
+
+USER lightoidc
+ENTRYPOINT java -jar /opt/lightoidc.jar