Add simple build system.

.github/workflows/build.yml

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+name: Build Docker image
+
+# Controls when the action will run.
+on:
+  # Triggers the workflow on all push or pull request events
+  push:
+  pull_request:
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+  schedule:
+    - cron: "0 0 * * *"
+
+# added using https://github.com/step-security/secure-repo
+permissions:
+  contents: read
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  Docker:
+    name: Build&Push to DockerHub
+    runs-on: ubuntu-latest
+    env:
+      DOCKER_REPO: sippylabs/webrtc_phone
+      PLATFORMS: linux/amd64 #,linux/i386,linux/arm/v7,linux/arm64
+      BASE_IMAGE: sippylabs/rtpproxy:RFC5245_ICE
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+      with:
+        submodules: 'recursive'
+
+    - name: Set up QEMU
+      id: qemu
+      uses: docker/setup-qemu-action@v3
+      with:
+        platforms: arm64,arm
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+
+    - name: Log in to Docker Hub
+      if: github.event_name != 'pull_request'
+      uses: docker/login-action@v2
+      with:
+        username: ${{ secrets.DOCKER_USERNAME }}
+        password: ${{ secrets.DOCKER_PASSWORD }}
+
+    - name: Extract metadata (tags, labels) for Docker
+      id: meta
+      uses: docker/metadata-action@v5
+      with:
+        images: ${{ env.DOCKER_REPO }}
+        tags: |
+          type=schedule
+          type=ref,event=branch
+          type=ref,event=tag
+          type=ref,event=pr
+          type=raw,value=latest,enable={{is_default_branch}}
+          type=sha
+
+    - name: Build Docker image
+      uses: docker/build-push-action@v6
+      with:
+        context: .
+        file: ./Dockerfile
+        build-args: BASE_IMAGE=${{ env.BASE_IMAGE }}
+        tags: |
+          ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}
+        platforms: ${{ env.PLATFORMS }}

Dockerfile

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+ARG BASE_IMAGE
+FROM --platform=$TARGETPLATFORM $BASE_IMAGE as build
+LABEL maintainer="Maksym Sobolyev <[email protected]>"
+
+USER root
+
+# Set Environment Variables
+ENV DEBIAN_FRONTEND noninteractive
+
+WORKDIR /webrtc_phone
+COPY . /webrtc_phone/
+
+# Build & install everything
+RUN /webrtc_phone/build.sh
+
+ENTRYPOINT ["/bin/echo", "done"]

build.sh

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+#!/bin/sh
+
+set -x
+set -e
+
+apt-get -y update -qq
+apt-get -y install git python-is-python3 python3-pip npm
+
+git clone -b RFC7118 https://github.com/sippy/b2bua
+git clone https://github.com/onsip/SIP.js.git
+
+python3 -m pip install --break-system-packages -U -r b2bua/requirements.txt
+
+cd SIP.js/demo
+npm install
+npm run build-demo
+cd -
+
+apt-get -y remove git
+apt-get -y autoremove
+apt-get -y clean