build: fix docker

Dockerfile

@@ -21,11 +21,13 @@ WORKDIR $HOME/app
 # where available (npm@5+)
 COPY --chown=user package*.json $HOME/app
 
-RUN npm install && npm run build
+RUN npm install
 
 # Copy the current directory contents into the container at $HOME/app setting the owner to the user
 COPY --chown=user . $HOME/app
 
+RUN npm run build
+
 EXPOSE 7860
 
 CMD [ "npm", "run", "start" ]

package.json

@@ -5,7 +5,7 @@
   "scripts": {
     "dev": "set DEBUG=gradio-chatbot && next dev --port 7860 --hostname 0.0.0.0",
     "build": "next build",
-    "start": "next start",
+    "start": "next start --port 7860",
     "lint": "next lint"
   },
   "dependencies": {