added Dockerfile, example compose and setup script

Dockerfile

@@ -0,0 +1,28 @@
+FROM alpine:latest
+
+ENV MINECRAFT_VERSION= \
+    PAPER_BUILD="latest" \
+    EULA="false" \
+    MC_RAM=""
+
+
+
+RUN apk update && \
+    apk add openjdk21-jre && \
+    apk add bash && \
+    apk add curl && \
+    apk add jq
+
+RUN addgroup -S servergrp
+RUN adduser -S server -G servergrp -D -u 1000
+USER server
+RUN mkdir /home/server/instance
+#RUN chown -hR server:servergrp /home/server/instance
+COPY setup.sh /home/server/
+
+
+CMD ["bash", "/home/server/setup.sh"]
+
+EXPOSE 25565
+VOLUME /home/server/instance
+