Add Dockerfile, compose, configs(ref redsolution#32)

Dockerfile

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+FROM ubuntu:20.04
+
+ARG DEBIAN_FRONTEND=noninteractive
+RUN apt-get -y update && \
+      buildDeps="ca-certificates \
+                 apt-utils \
+                 curl \
+                 gcc \
+                 make \
+                 expat \
+                 libexpat1-dev \
+                 git \
+                 erlang" && \
+      apt-get install -y --no-install-recommends ${buildDeps} && \
+      apt-get autoremove -y && \
+      apt-get clean -y
+
+RUN mkdir /app
+WORKDIR /app
+
+RUN mkdir ./xabber-websocket && \
+      cd xabber-websocket && \
+      curl -sL https://github.com/redsolution/xabber-websocket/archive/0.3.1.tar.gz | \
+      tar -zx --strip-components=1 && \
+      make
+
+FROM ubuntu:20.04
+
+RUN apt-get -y update && \
+      buildDeps="curl \
+                 nginx" && \
+      apt-get install -y --no-install-recommends ${buildDeps} && \
+      apt-get autoremove -y && \
+      apt-get clean -y
+
+RUN mkdir /app
+WORKDIR /app
+
+COPY --from=0  /app/xabber-websocket/_rel/xabber_ws/ ./xabber_ws/
+RUN rm -rf /etc/nginx/sites-enabled/default
+COPY ./docker/xabber.conf /etc/nginx/conf.d/
+
+COPY . ./
+
+COPY ./docker/entrypoint.sh /usr/local/bin/
+ENTRYPOINT [ "/usr/local/bin/entrypoint.sh" ]
+
+CMD [ "/usr/sbin/nginx", "-g", "daemon off;" ]

docker-compose.yml

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+version: '3.4'
+services:
+  xabber:
+    build: ./
+    ports:
+      - 3080:80
+      - 3081:8080 # HOST:CONTAINER
+    restart: always
+    environment:
+      CONNECTION_URL: "'ws://localhost:3081/websocket'"
+      LOG_LEVEL: "'WARN'"
+
+      # ALL VALUES SHOULD BE QUOTED, STRINGS DOUBLE QUOTED
+      # because first quotes will be dropped at run time in ENTRYPOINT
+
+      # DEBUG 
+      # XABBER_ACCOUNT_URL 
+      # API_SERVICE_URL 
+      # USE_SOCIAL_AUTH 
+      # DEFAULT_LOGIN_SCREEN 
+      # STORAGE_NAME_ENDING 
+      # TURN_SERVERS_LIST 
+      # DISABLE_LOOKUP_WS 
+      # REGISTER_XMPP_ACCOUNT

docker/entrypoint.sh

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+#!/bin/bash
+echo 'Start Xabber WS Server...'
+/app/xabber_ws/bin/xabber_ws start
+echo 'Start Xabber WS Server - OK'
+
+cd /app
+cp ./example_index.html ./index.html
+
+VARS=(
+  CONNECTION_URL 
+  LOG_LEVEL 
+  DEBUG 
+  XABBER_ACCOUNT_URL 
+  API_SERVICE_URL 
+  USE_SOCIAL_AUTH 
+  DEFAULT_LOGIN_SCREEN 
+  STORAGE_NAME_ENDING 
+  TURN_SERVERS_LIST 
+  DISABLE_LOOKUP_WS 
+  REGISTER_XMPP_ACCOUNT
+)
+for var in ${VARS[@]}
+do
+  echo "Check $var in index.html"
+  if [ -z ${!var+x} ]; then
+    echo "$var is empty"
+  else
+    grep -q "$var" ./index.html
+    if [[ $? -eq 0 ]]; then
+      echo "Replace $var in index.html"
+      sed  "s#$var.*#$var: ${!var},#" ./index.html > ./new_index.html && mv ./new_index.html ./index.html
+    else
+      echo "Add value var to index.html"
+      sed  "s/xabber.configure({/a $var: ${!var}," ./index.html > ./new_index.html && mv ./new_index.html ./index.html
+    fi
+  fi
+done
+
+exec "$@"

docker/xabber.conf

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+
+server {  
+    listen       80  default_server;
+    server_name  _;
+
+    root /app;
+    index index.html;
+
+    location / {
+      try_files $uri $uri/ =404;
+    }
+}