Add Dockerfile for building the runtime image

Dockerfile-for-building-the-runtime-image.md

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+```
+# Use the official golang:1.22.12-bookworm image as the build stage
+FROM golang:1.22.12-bookworm
+
+# Create a directory /app
+RUN mkdir /app
+
+# Set the working directory to /app
+WORKDIR /app
+
+# Copy the current directory contents into /app
+COPY ./ /app/
+
+# Update the package list and install necessary packages
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    curl \
+    wget \
+    vim \
+    git \
+    debconf \
+    ca-certificates \
+    tar \
+    autoconf \
+    automake \
+    build-essential \
+    cmake \
+    git-core \
+    libass-dev \
+    libfreetype6-dev \
+    libgnutls28-dev \
+    libmp3lame-dev \
+    libsdl2-dev \
+    libtool \
+    libva-dev \
+    libvdpau-dev \
+    libvorbis-dev \
+    libxcb1-dev \
+    libxcb-shm0-dev \
+    libxcb-xfixes0-dev \
+    meson \
+    ninja-build \
+    pkg-config \
+    texinfo \
+    yasm \
+    zlib1g-dev \
+    libx264-dev \
+    libx265-dev \
+    libnuma-dev \
+    libvpx-dev \
+    libopus-dev \
+    libunistring-dev \
+    libaom-dev \
+    libdav1d-dev && \
+    # Download Go module dependencies
+    go mod download && \
+    # Download yt-dlp
+    wget --no-check-certificate -c https://github.com/yt-dlp/yt-dlp/releases/download/2025.01.26/yt-dlp_linux &&\
+    # Download ffmpeg
+    wget --no-check-certificate -c https://www.johnvansickle.com/ffmpeg/old-releases/ffmpeg-6.0.1-amd64-static.tar.xz &&\
+    # Move yt-dlp to /usr/bin and set permissions
+    mv yt-dlp_linux /usr/bin/yt-dlp && \
+    chmod 755 /usr/bin/yt-dlp && \
+    chmod +x /usr/bin/yt-dlp && \
+    # Extract ffmpeg tarball
+    tar -xf ffmpeg-6.0.1-amd64-static.tar.xz && \
+    # Remove the tarball
+    rm -rf ffmpeg-6.0.1-amd64-static.tar.xz && \
+    # Set execute permissions for ffmpeg and ffprobe
+    chmod +x ffmpeg-6.0.1-amd64-static/ffmpeg && \ 
+    chmod +x ffmpeg-6.0.1-amd64-static/ffprobe && \
+    # Copy ffmpeg and ffprobe to /usr/bin
+    cp -R ffmpeg-6.0.1-amd64-static/ffmpeg /usr/bin/ && \
+    cp -R ffmpeg-6.0.1-amd64-static/ffprobe /usr/bin/ && \
+    # Remove the extracted ffmpeg directory
+    rm -rf ffmpeg-6.0.1-amd64-static && \
+    # Create a new user 'papibot'
+    useradd papibot && \
+    # Build the Go application
+    CGO_ENABLED=0 GOOS=linux go build -o /app/papibot
+
+```