Update Dockerfile

Dockerfile

@@ -1,18 +1,31 @@
-# ---------- builder ----------
+########################  builder stage  ########################
 FROM python:3.9-slim AS builder
 WORKDIR /build
-COPY app.py requirements.txt .
-RUN pip install --prefix=/install -r requirements.txt
-RUN python -m compileall -b -f app.py     
-RUN tar -C /build -cf /build/app.tgz app.pyc  
 
-# ---------- runtime ----------
+# --- install dependencies into /install ---
+COPY requirements.txt .
+RUN pip install --prefix=/install --no-cache-dir -r requirements.txt
+
+# --- copy source and compile to byte-code ---
+COPY app.py .
+RUN python -m compileall -b -f app.py        # produces /build/app.pyc
+
+# --- pack the .pyc into a gzip tarball ---
+RUN tar -C /build -czf /build/app.tgz app.pyc
+
+########################  runtime stage  ########################
 FROM python:3.9-slim
 WORKDIR /app
-COPY --from=builder /install /usr/local/        
-COPY --from=builder /build/app.tgz ./app.tgz    
 
-# entrypoint will unpack into /tmp, run, then delete
+# 1) bring in site-packages from builder
+COPY --from=builder /install /usr/local/
+
+# 2) bring in the compressed payload only
+COPY --from=builder /build/app.tgz ./app.tgz
+
+# 3) entry-point that unpacks → runs → deletes
 COPY entrypoint.sh /entrypoint.sh
 RUN chmod +x /entrypoint.sh
+
+EXPOSE 7860
 ENTRYPOINT ["/entrypoint.sh"]