Update Dockerfile

Dockerfile

@@ -18,33 +18,21 @@ RUN set -x \
  && npm cache clear --force \
  && chown -R rocketchat:rocketchat /app
 
-# Install NGINX for reverse proxy
+# Install iptables
 RUN apt-get update && \
-    apt-get install -y nginx && \
+    apt-get install -y iptables && \
     rm -rf /var/lib/apt/lists/*
 
-# Configure NGINX to proxy from port 7860 to Rocket.Chat’s internal port 3000
-RUN echo "\
-server {\n\
-    listen 7860;\n\
-    location / {\n\
-        proxy_pass http://localhost:3000;\n\
-        proxy_http_version 1.1;\n\
-        proxy_set_header Upgrade \$http_upgrade;\n\
-        proxy_set_header Connection 'upgrade';\n\
-        proxy_set_header Host \$host;\n\
-        proxy_cache_bypass \$http_upgrade;\n\
-    }\n\
-}\n" > /etc/nginx/sites-available/default
-
-# Run NGINX in the background, then start Rocket.Chat
+# Set up iptables rule to redirect port 7860 to 3000
+RUN iptables -t nat -A PREROUTING -p tcp --dport 7860 -j REDIRECT --to-port 3000
+
 USER rocketchat
 
 VOLUME /app/uploads
 
 WORKDIR /app/bundle
 
-# needs a mongo instance - defaults to container linking with alias 'mongo'
+# Environment settings for Rocket.Chat
 ENV DEPLOY_METHOD=docker \
     NODE_ENV=production \
     MONGO_URL=mongodb://mongo:27017/rocketchat \
@@ -53,6 +41,7 @@ ENV DEPLOY_METHOD=docker \
     ROOT_URL=http://localhost:3000 \
     Accounts_AvatarStorePath=/app/uploads
 
+# Expose the external port 7860
 EXPOSE 7860
 
-CMD service nginx start && node main.js
+CMD ["node", "main.js"]