Update Dockerfile

Dockerfile

@@ -1,7 +1,7 @@
 FROM python:3.9
 
 # ----------------------------
-# System dependencies
+# System dependencies (IMPORTANT: add openssl dev explicitly)
 # ----------------------------
 RUN apt-get update && apt-get install -y \
     git \
@@ -9,18 +9,23 @@ RUN apt-get update && apt-get install -y \
     g++ \
     zip \
     libssl-dev \
+    openssl \
+    pkg-config \
     && rm -rf /var/lib/apt/lists/*
 
 # ----------------------------
-# Build zsign (correct + reliable)
+# Build zsign (more reliable method)
 # ----------------------------
 RUN git clone https://github.com/zhlynn/zsign.git /opt/zsign && \
     cd /opt/zsign && \
-    make && \
-    cp zsign /usr/local/bin/zsign
+    make clean || true && \
+    make
+
+# Find binary safely instead of guessing path
+RUN find /opt/zsign -type f -name "zsign" -exec cp {} /usr/local/bin/zsign \;
 
 # ----------------------------
-# App setup
+# App
 # ----------------------------
 WORKDIR /app
 COPY . .
@@ -28,6 +33,6 @@ COPY . .
 RUN pip install flask flask-cors gunicorn
 
 # ----------------------------
-# IMPORTANT: Gunicorn config (single line only)
+# Gunicorn (FIXED)
 # ----------------------------
 CMD ["gunicorn", "app:app", "--bind", "0.0.0.0:7860", "--workers", "1", "--timeout", "600"]