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+FROM ubuntu:22.04
+
+ENV DEBIAN_FRONTEND=noninteractive
+
+# ── Build dependencies ────────────────────────────────────────────────────────
+RUN apt-get update && apt-get install -y \
+    cmake \
+    g++ \
+    git \
+    libssl-dev \
+    zlib1g-dev \
+    gperf \
+    libgperf-dev \
+    make \
+    curl \
+    ca-certificates \
+    && rm -rf /var/lib/apt/lists/*
+
+# ── Clone and build the official Telegram Bot API server ─────────────────────
+# Pin to a specific commit for reproducibility
+RUN git clone --recursive https://github.com/tdlib/telegram-bot-api.git /tmp/telegram-bot-api
+
+WORKDIR /tmp/telegram-bot-api
+
+RUN mkdir build && cd build && \
+    cmake -DCMAKE_BUILD_TYPE=Release \
+          -DCMAKE_INSTALL_PREFIX:PATH=/usr/local \
+          .. && \
+    cmake --build . --target install -j$(nproc)
+
+# ── Runtime setup ─────────────────────────────────────────────────────────────
+RUN mkdir -p /data /var/log/telegram-bot-api
+
+# HuggingFace Spaces requires the app to run as a non-root user
+RUN useradd -m -u 1000 botapi && \
+    chown -R botapi:botapi /data /var/log/telegram-bot-api
+
+USER botapi
+
+# HF Spaces exposes port 7860
+EXPOSE 7860
+
+# ── Entrypoint ────────────────────────────────────────────────────────────────
+# API_ID and API_HASH must be set as HF Space secrets
+CMD telegram-bot-api \
+    --api-id=${API_ID} \
+    --api-hash=${API_HASH} \
+    --http-port=7860 \
+    --dir=/data \
+    --temp-dir=/data/temp \
+    --log=/var/log/telegram-bot-api/server.log \
+    --verbosity=1