Docker improvements

Dockerfile

@@ -1,15 +1,26 @@
 # Dockerfile
-FROM node:20-alpine3.17
+FROM node:20-alpine as builder
 
 WORKDIR /app
 
-COPY package*.json ./
+COPY package.json /app/
+COPY package-lock.json /app/
 
 RUN npm install
+ADD . /app
+RUN npm run build
+
+# start final image
+FROM node:20-alpine
 
-COPY . .
+WORKDIR /app
 
+# copy over build files from builder step
+COPY --from=builder /app/.output  app/.output
+COPY --from=builder /app/.nuxt  app/.nuxt
+
+# expose the host and port 3000 to the server
+ENV HOST 0.0.0.0
 EXPOSE 3000
 
-RUN npm run build
 CMD [ "npm", "run", "start" ]