fixed build issues

Dockerfile

@@ -0,0 +1,28 @@
+FROM ubuntu:22.04
+
+# Avoid prompts from apt during build
+ENV DEBIAN_FRONTEND=noninteractive
+
+# Install required packages for Signal Server
+RUN apt-get update && apt-get install -y \
+    build-essential \
+    gcc \
+    g++ \
+    make \
+    libbz2-dev \
+    zlib1g-dev \
+    libpthread-stubs0-dev \
+    git \
+    && rm -rf /var/lib/apt/lists/*
+
+# Set working directory
+WORKDIR /workspace
+
+# Copy the project files
+COPY . .
+
+# Set default shell
+SHELL ["/bin/bash", "-c"]
+
+# Default command
+CMD ["/bin/bash"]