Update Dockerfile

Dockerfile

@@ -18,10 +18,10 @@ COPY . .
 #RUN mkdir -p public
 
 # Your app binds to port 3000 so you'll use the EXPOSE instruction to have it mapped by the docker daemon
-EXPOSE 3000
+EXPOSE 7860
 
 # Define environment variable
-ENV PORT=3000
+ENV PORT=7860
 
 # Command to run the application
 CMD [ "node", "index.js" ]