update:

workspace/sprint_1_2/CODEBASE/deps/implementation/CD_server/Dockerfile

@@ -1,17 +1,33 @@
-FROM python:3.12-slim
+# Stage 1: Builder
+FROM python:3.12-slim AS builder
 
 WORKDIR /app
 
 COPY requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt
 
-COPY main.py config.py docker_ops.py schemas.py config.yaml ./
+# Simply downloads the pre-compiled wheels from PyPI without needing a compiler
+RUN pip wheel --no-cache-dir --wheel-dir=/app/wheels -r requirements.txt
 
-RUN groupadd -g 998 docker || true
-RUN useradd -m -u 998 -g docker appuser
+
+# Stage 2: Final Runtime
+FROM python:3.12-slim
+
+WORKDIR /app
+
+# 1. Setup system user first (Cached forever because it doesn't rely on files)
+RUN groupadd -g 998 docker || true \
+    && useradd -l -m -u 998 -g docker appuser
+
+# 2. Bring in the wheels
+COPY --from=builder /app/wheels /app/wheels
+
+# 3. Install dependencies (Only runs if requirements.txt changed)
+RUN pip install --no-cache-dir --no-index --find-links=/app/wheels /app/wheels/*.whl \
+    && rm -rf /app/wheels
+
+# 4. Copy code files
+COPY --chown=appuser:docker main.py config.py docker_ops.py schemas.py config.yaml ./
 
 USER appuser
-
 EXPOSE 3333
-
-CMD ["python", "main.py"]
+CMD ["python", "main.py"]