diff --git a/api/Dockerfile b/api/Dockerfile
index 1d32806..faa6b8b 100644
--- a/api/Dockerfile
+++ b/api/Dockerfile
@@ -1,5 +1,13 @@
 FROM node:15.8.0-alpine3.13
-RUN apk add --no-cache gnupg tar bash coreutils
+RUN apk add --no-cache gnupg tar bash coreutils shadow
+RUN for i in $(seq 1000 1500); do \
+        groupadd -g $i runner$i && \
+        useradd -M runner$i -g $i -u $i && \
+        echo "runner$i soft nproc 64" >> /etc/security/limits.conf && \
+        echo "runner$i hard nproc 64" >> /etc/security/limits.conf && \ 
+        echo "runner$i soft nofile 2048" >> /etc/security/limits.conf && \
+        echo "runner$i hard nofile 2048" >> /etc/security/limits.conf ;\
+    done
 
 ENV NODE_ENV=production
 WORKDIR /piston_api