reduce size of docker image

src/dock/Dockerfile

@@ -1,4 +1,4 @@
-FROM node:18-buster
+FROM node:18-slim
 WORKDIR /grid
 COPY package.json /grid
 COPY app.js /grid
@@ -6,6 +6,7 @@ COPY apps /grid/apps
 COPY src /grid/src
 COPY web /grid/web
 COPY bin /grid/bin
+RUN apt-get -y update; apt-get -y install curl
 EXPOSE 8080
 RUN npm i
 RUN npm install -g @gridspace/app-server