diff --git a/regexr/Dockerfile b/regexr/Dockerfile
index e4fa5cd..79da87e 100644
--- a/regexr/Dockerfile
+++ b/regexr/Dockerfile
@@ -1,9 +1,14 @@
-FROM node:stretch
+FROM node:13-alpine
 LABEL maintainer=heywoodlh
 
-RUN git clone https://github.com/gskinner/regexr /opt/regexr
+RUN apk add --no-cache git shadow
+RUN git clone --depth=1 https://github.com/gskinner/regexr /opt/regexr
 
+RUN npm install --global gulp-cli
+RUN useradd -M -d /opt/regexr runner && chown runner:runner /opt/regexr
+USER runner
 WORKDIR /opt/regexr
-
-
-EXPOSE 80
+RUN npm install
+EXPOSE 3000
+EXPOSE 3001
+ENTRYPOINT ["gulp", "--cwd", "/opt/regexr"]