add dockerfile for custom rhel image

scripts/docker/Dockerfile.rhel

@@ -0,0 +1,74 @@
+# Dockerfile for RHEL/Fedora build environment
+# Automates all setup steps from the build-rhel workflow job
+#
+# Usage:
+#   docker build -f scripts/docker/Dockerfile.rhel -t android-file-handler-rhel-builder .
+#   docker run -v $(pwd):/workspace -w /workspace android-file-handler-rhel-builder
+
+FROM fedora:latest
+
+# Set build argument for fpm version (can be overridden at build time)
+ARG FPM_VERSION=1.16.0
+
+# Install system dependencies
+RUN dnf -y update && \
+    dnf -y install \
+    gcc \
+    make \
+    zlib-devel \
+    bzip2 \
+    bzip2-devel \
+    readline-devel \
+    sqlite-devel \
+    openssl-devel \
+    libffi-devel \
+    wget \
+    tar \
+    git \
+    curl \
+    ruby \
+    rubygems \
+    rpm-build \
+    redhat-rpm-config \
+    gcc-c++ \
+    patch \
+    which \
+    xz-devel && \
+    dnf clean all
+
+# Install pyenv
+ENV PYENV_ROOT="/root/.pyenv"
+ENV PATH="$PYENV_ROOT/bin:$PATH"
+
+RUN git clone https://github.com/pyenv/pyenv.git /root/.pyenv
+
+# Install Python 3.12 via pyenv
+RUN eval "$(pyenv init -)" && \
+    pyenv install 3.12.0 && \
+    pyenv global 3.12.0 && \
+    pyenv rehash
+
+# Update PATH to include pyenv shims
+ENV PATH="/root/.pyenv/shims:$PATH"
+
+# Install Poetry
+RUN curl -sSL https://install.python-poetry.org | python3 - --yes
+
+# Add Poetry to PATH
+ENV PATH="/root/.local/bin:$PATH"
+
+# Verify Poetry installation
+RUN poetry --version
+
+# Install fpm
+RUN gem install --no-document -v "${FPM_VERSION}" fpm
+
+# Set working directory
+WORKDIR /workspace
+
+# Set environment variables for build
+ENV CI_CD=true
+ENV DISTRO_TYPE=rhel
+
+# Default command runs the build script
+CMD ["sh", "-c", "poetry install --no-interaction && poetry run python scripts/build_package_linux.py"]