split base build to multiple dockerfiles.

client/.env.development

@@ -1 +0,0 @@
-VUE_APP_SERVER_PORT=3000

client/Dockerfile

@@ -1,4 +1,6 @@
-FROM node:18-bullseye-slim as client
+ARG BASE_IMAGE=node:18-bullseye-slim
+FROM $BASE_IMAGE AS client
+
 WORKDIR /src
 
 #
@@ -10,3 +12,7 @@ RUN npm install
 # build client
 COPY . .
 RUN npm run build
+
+#
+# artifacts from this stage
+# COPY --from=client /src/dist/ /var/www