Fix missing jsoncpp in the Docker image

Lejo1 · web-flow · commit 13b50f55a45b · 2021-03-09T00:57:12.000+01:00
diff --git a/Dockerfile b/Dockerfile
@@ -51,7 +51,7 @@ RUN mkdir build && \
 
 FROM alpine:3.11
 
-RUN apk add --no-cache sqlite-libs curl gmp libstdc++ libgcc libpq luajit && \
+RUN apk add --no-cache sqlite-libs curl gmp libstdc++ libgcc libpq luajit jsoncpp && \
 	adduser -D minetest --uid 30000 -h /var/lib/minetest && \
 	chown -R minetest:minetest /var/lib/minetest
 
