hope it works now

Author: AlphaNecron

judge/Dockerfile

@@ -3,7 +3,7 @@ FROM dmoj/runtimes-tier1
 ARG TAG=master
 
 RUN apt-get update && \
-    apt-get install -y --no-install-recommends gnupg \
+    apt-get install -y --no-install-recommends gnupg && \
     apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 6ED0E7B82643E131 && \
     apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 78DBA3BC47EF2265