Create node.md

docs/node.md

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+# Host your Erebrus node
+
+## Install and Deploy using Docker
+
+1. Install docker [(setup docs)](https://github.com/NetSepio/erebrus/blob/main/docs/setup.md).
+
+2. create a .env file in same directory and define the environment for erebrus . you can use template from [.sample-env](https://github.com/NetSepio/erebrus/blob/main/.sample-env). Make sure to put the correct server URL.
+
+3. Open incoming request to ports: TCP Ports 9080(http), 9090(gRPC), 9001(p2p) and UDP port 51820 of your server to communicate with the gateway  
+
+4. Pull the ererbus docker image
+
+5. Run the Image
+
+```
+docker run -d -p 9080:9080/tcp -p 9002:9002/tcp -p 51820:51820/udp \
+--cap-add=NET_ADMIN --cap-add=SYS_MODULE \
+--sysctl="net.ipv4.conf.all.src_valid_mark=1" \
+--sysctl="net.ipv6.conf.all.forwarding=1" \
+--restart unless-stopped \
+-v ~/wireguard/:/etc/wireguard/ \
+--name erebrus --env-file .env \
+ghcr.io/netsepio/erebrus:main
+
+```