Merge pull request vircadia#1734 from vircadia/feature/multi-server

Docker configurations for servers.

pkg-scripts/docker-compose-generation/Docker-compose.md

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+# Running multiple containers
+
+## _This is the instruction of how to establish seven containers to let them connect with each other using docker-compose command in a YAML file. (one domain server + six assignment clients)_
+
+
+---
+## _How to start the containers_
+
+ - clone the repo or single yaml file and jump into that directory.
+
+ - modify the following commands in the yaml file.
+
+```
+domain-server:
+    image: <image_name>
+
+assignment-client:
+    image: <image_name>
+
+```
+
+ - run the following command in your terminal.
+
+ ```
+ docker-compose up -d --scale assignment-client=6
+ ```
+
+ - after running the above command, check all running and stopped containers by typing (or you can find the containers on docker desktop if you have).
+
+```
+docker ps
+```
+
+ ```
+ docker ps -a
+ ```
+
+  ---
+
+ ## _How to check the servers in the containers are operating properly_
+
+ - start vircadia and type localhost in explore app.
+
+ - type "localhost:40100" in your web explorer.
+
+ - you should see seven (or six) nodes by clicking Nodes on top.
+
+ ---
+
+ ## _Note: the other five assigment client containers have to be started manually either through terminal or docker desktop_

pkg-scripts/docker-compose-generation/docker-compose.yml

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+# We need 7 containers in total, one domain server 
+# + six assignment clients
+# -a 172.17.0.1
+
+version: "3.8"
+services:
+  domain-server:
+    image: james422481/vircadia_server:1
+    ports:
+      - "40100:40100/tcp"
+      - "40102:40102/udp"
+    command: /opt/vircadia/domain-server
+  assignment-client:
+    image: james422481/vircadia_server:1
+    ports:
+      - "40200-40205:40200/udp"
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
+    command: /opt/vircadia/assignment-client -a host.docker.internal -p 40200 --server-port 40102 --disable-domain-port-auto-discovery

pkg-scripts/docker-image-generation/Docker-image.md

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+# Building the server image
+
+## _This is the instruction of how to build the image that contains the domain-server and the assignment-clients (and the ice-server) using the Dockerfile_
+
+---
+## _How to build the image_
+
+ - clone the repo or the folder named "docker-image-generation" and jump into that directory.
+
+ - copy the .deb file into this folder and modify the following command in Dockerfile.
+
+ ```
+COPY <filename.deb>
+ ```
+
+ - run the following command in your terminal (Ubuntu 20.04).
+
+ - make sure you assign a name to the image by replacing "image_name".
+
+ ```
+docker build -t <image_name> .
+ ```
+
+ ---
+
+ ## _How to check the image is built successfully_
+
+ - run the following command (after starting docker desktop if you have).
+
+```
+docker image ls
+```
+
+ - if the image is built properly, you should be able to find the image in the list.
+
+

pkg-scripts/docker-image-generation/Dockerfile

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+FROM ubuntu:20.04
+COPY vircadia-server_2022.12.02-20221123-4ff3625-0ubuntu1-1_amd64.deb .
+RUN apt update
+RUN apt install libcap2-bin -y
+RUN apt install systemd -y
+RUN apt -y install ./vircadia-server_2022.12.02-20221123-4ff3625-0ubuntu1-1_amd64.deb