diff --git a/application/single_app/Dockerfile b/application/single_app/Dockerfile
index c6209334..65483ac6 100644
--- a/application/single_app/Dockerfile
+++ b/application/single_app/Dockerfile
@@ -1,98 +1,72 @@
-# Stage 1: System dependencies and ODBC driver install
-ARG PYTHON_MAJOR_VERSION_ARG="3"
-ARG PYTHON_MINOR_VERSION_ARG="13"
-ARG PYTHON_PATCH_VERSION_ARG="11"
-FROM debian:12-slim AS builder
+# Create nonroot user/group with a stable UID/GID (choose values consistent with your org)
+ARG UID=65532
+ARG GID=65532
 
-ARG PYTHON_MAJOR_VERSION_ARG
-ARG PYTHON_MINOR_VERSION_ARG
-ARG PYTHON_PATCH_VERSION_ARG
+FROM mcr.microsoft.com/azurelinux/base/python:3.12 AS builder
+
+ARG UID
+ARG GID
+
+# Setup pip.conf if has content
+COPY pip.conf.d/ /etc/pip.conf.d
+
+# CA
+# copy certs to /etc/pki/ca-trust/source/anchors
+COPY custom-ca-certificates/ /etc/ssl/certs
+RUN mkdir -p /etc/pki/ca-trust/source/anchors/ \
+    && update-ca-trust enable \
+    && cp /etc/ssl/certs/*.crt /etc/pki/ca-trust/source/anchors/ \
+    && update-ca-trust extract
+
+ENV PYTHONUNBUFFERED=1
+
+RUN set -eux; \
+    echo "nonroot:x:${GID}:" >> /etc/group; \
+    echo "nonroot:x:${UID}:${GID}:nonroot:/home/nonroot:/bin/bash" >> /etc/passwd; \
+    mkdir -p /home/nonroot; \
+    chown ${UID}:${GID} /home/nonroot; \
+    mkdir -p /app; \
+    chown ${UID}:${GID} /app; \
+    chmod 744 /app
+
+RUN mkdir -p /app/flask_session && chown -R ${UID}:${GID} /app/flask_session
+RUN mkdir /sc-temp-files && chown -R ${UID}:${GID} /sc-temp-files
 
-ENV DEBIAN_FRONTEND=noninteractive \
-    PYTHONIOENCODING=utf-8 \
-    LANG=C.UTF-8 \
-    LC_ALL=C.UTF-8
-
-# Build deps for CPython and pip stdlib modules
-WORKDIR /deps
-RUN apt-get update && apt-get install -y --no-install-recommends \
-    build-essential \
-    wget ca-certificates \
-    libssl-dev zlib1g-dev libbz2-dev libreadline-dev libsqlite3-dev \
-    libncursesw5-dev libffi-dev liblzma-dev uuid-dev tk-dev && \
-    rm -rf /var/lib/apt/lists/*
-
-# Build and install Python from source
-# Example: https://www.python.org/ftp/python/3.13.11/Python-3.13.11.tgz
-WORKDIR /tmp
-RUN wget https://www.python.org/ftp/python/${PYTHON_MAJOR_VERSION_ARG}.${PYTHON_MINOR_VERSION_ARG}.${PYTHON_PATCH_VERSION_ARG}/Python-${PYTHON_MAJOR_VERSION_ARG}.${PYTHON_MINOR_VERSION_ARG}.${PYTHON_PATCH_VERSION_ARG}.tgz && \
-    tar -xzf Python-${PYTHON_MAJOR_VERSION_ARG}.${PYTHON_MINOR_VERSION_ARG}.${PYTHON_PATCH_VERSION_ARG}.tgz && \
-    cd Python-${PYTHON_MAJOR_VERSION_ARG}.${PYTHON_MINOR_VERSION_ARG}.${PYTHON_PATCH_VERSION_ARG} && \
-    LDFLAGS="-Wl,-rpath,/usr/local/lib" ./configure --enable-optimizations --enable-shared --with-ensurepip=install --prefix=/usr/local && \
-    make -j"$(nproc)" && \
-    make altinstall
-
-USER root
 WORKDIR /app
-RUN groupadd -g 65532 nonroot && useradd -m -u 65532 -g nonroot nonroot
 
-RUN python${PYTHON_MAJOR_VERSION_ARG}.${PYTHON_MINOR_VERSION_ARG} -m venv /app/venv
-RUN python${PYTHON_MAJOR_VERSION_ARG}.${PYTHON_MINOR_VERSION_ARG} -m pip install wheel
+# Copy requirements and install them to system
+COPY --chown=${UID}:${GID} application/single_app/requirements.txt .
+RUN python3 -m pip install --no-cache-dir -r requirements.txt
 
-# Copy requirements and install them into the virtualenv
-ENV PATH="/app/venv/bin:$PATH"
-COPY application/single_app/requirements.txt /app/requirements.txt
-RUN python${PYTHON_MAJOR_VERSION_ARG}.${PYTHON_MINOR_VERSION_ARG} -m pip install --no-cache-dir -r /app/requirements.txt
+FROM mcr.microsoft.com/azurelinux/distroless/python:3.12
 
-# Fix permissions so nonroot can use everything
-RUN chown -R 65532:65532 /app
+ARG UID
+ARG GID
 
-RUN mkdir -p /app/flask_session && chown -R 65532:65532 /app/flask_session
-RUN mkdir /sc-temp-files && chown -R 65532:65532 /sc-temp-files
-USER 65532:65532
+COPY --from=builder /etc/pki /etc/pki
+COPY --from=builder /home/nonroot /home/nonroot
+COPY --from=builder /etc/passwd /etc/passwd
+COPY --from=builder /etc/group /etc/group
+COPY --from=builder /usr/lib/python3.12 /usr/lib/python3.12
 
-#Stage 2: Final containter
-FROM gcr.io/distroless/base-debian12:latest
-ARG PYTHON_MAJOR_VERSION_ARG
-ARG PYTHON_MINOR_VERSION_ARG
-ARG PYTHON_PATCH_VERSION_ARG
+USER ${UID}:${GID}
 
-ENV PYTHONIOENCODING=utf-8 \
+COPY --from=builder --chown=${UID}:${GID} /app /app
+COPY --from=builder --chown=${UID}:${GID} /sc-temp-files /sc-temp-files
+
+ENV HOME=/home/nonroot \
+    PATH="/home/nonroot/.local/bin:$PATH" \
+    PYTHONIOENCODING=utf-8 \
     LANG=C.UTF-8 \
     LC_ALL=C.UTF-8 \
-    PYTHONUNBUFFERED=1 \
-    PATH="/app/venv/bin:/usr/local/bin:$PATH" \
-    LD_LIBRARY_PATH="/usr/local/lib:${LD_LIBRARY_PATH}"
+    PYTHONUNBUFFERED=1
 
 WORKDIR /app
 
-USER root
-
-# Copy only the built Python interpreter (venv entrypoint handles python/python3)
-# Copy the full CPython installation so stdlib modules (e.g., encodings) are available
-COPY --from=builder /usr/local/ /usr/local/
-
-# Copy system libraries for x86_64
-COPY --from=builder /lib/x86_64-linux-gnu/ \
-    /lib64/ld-linux-x86-64.so.2 \
-    /usr/lib/x86_64-linux-gnu/
-    #/usr/share/ca-certificates \
-    #/etc/ssl/certs \
-    #/usr/bin/ffmpeg \
-    #/usr/share/zoneinfo /usr/share/
-
 # Copy application code and set ownership
-COPY --chown=65532:65532 application/single_app/ /app/
-
-# Copy the virtualenv from the builder stage
-COPY --from=builder --chown=65532:65532 /app/venv /app/venv
-COPY --from=builder --chown=65532:65532 /app/flask_session /app/flask_session
-COPY --from=builder --chown=65532:65532 /sc-temp-files /sc-temp-files
+COPY --chown=${UID}:${GID} application/single_app ./
 
 # Expose port
 EXPOSE 5000
 
-USER 65532:65532
-
-
-ENTRYPOINT ["/app/venv/bin/python", "-c", "import runpy; runpy.run_path('/app/app.py', run_name='__main__')"]
\ No newline at end of file
+ENTRYPOINT [ "python3", "/app/app.py" ]
diff --git a/custom-ca-certificates/.gitkeep b/custom-ca-certificates/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/pip.conf.d/.gitkeep b/pip.conf.d/.gitkeep
new file mode 100644
index 00000000..e69de29b