Create Dockerfile

Dockerfile

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+FROM node:20-bullseye
+
+# ─────────────────────────────────────────────
+# System dependencies
+# ─────────────────────────────────────────────
+RUN apt-get update && apt-get install -y \
+    openjdk-17-jdk \
+    wget \
+    unzip \
+    zip \
+    curl \
+    git \
+    && rm -rf /var/lib/apt/lists/*
+
+# Java environment
+ENV JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64
+ENV PATH=$JAVA_HOME/bin:$PATH
+
+# ─────────────────────────────────────────────
+# Android SDK (apksigner + zipalign)
+# ─────────────────────────────────────────────
+ENV ANDROID_SDK_ROOT=/android-sdk
+RUN mkdir -p $ANDROID_SDK_ROOT
+
+WORKDIR /android-sdk
+
+RUN wget https://dl.google.com/android/repository/commandlinetools-linux-11076708_latest.zip -O cmdtools.zip && \
+    unzip cmdtools.zip && \
+    rm cmdtools.zip && \
+    mkdir -p cmdline-tools/latest && \
+    mv cmdline-tools/* cmdline-tools/latest/ || true
+
+ENV PATH=$ANDROID_SDK_ROOT/cmdline-tools/latest/bin:$PATH
+
+RUN yes | sdkmanager --licenses && \
+    sdkmanager "platform-tools" "build-tools;34.0.0"
+
+ENV PATH=$ANDROID_SDK_ROOT/build-tools/34.0.0:$PATH
+
+# ─────────────────────────────────────────────
+# App setup
+# ─────────────────────────────────────────────
+WORKDIR /app
+
+# Install dependencies directly (no package.json needed)
+RUN npm install express multer adm-zip axios
+
+# Copy backend code
+COPY index.js .
+
+# IMPORTANT: your requested permission line
+RUN chmod -R 777 /app
+
+# Temp storage
+RUN mkdir -p /tmp/apk-sessions
+
+EXPOSE 7860
+
+CMD ["node", "index.js"]