added papermc, waterfall and a small script update

siverten/papermc/Dockerfile

@@ -0,0 +1,17 @@
+FROM openjdk:16-slim
+
+ENV MC_VERSION="latest" \
+    PAPER_BUILD="latest" \
+    MC_RAM="4G" \
+    JAVA_OPTS=""
+
+ADD papermc.sh .
+RUN apt-get update \
+    && apt-get install -y wget \
+    && apt-get install -y jq \
+    && mkdir /papermc
+
+CMD ["sh", "./papermc.sh"]
+
+EXPOSE 25565
+VOLUME /papermc