diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index 7ab48e4..01c0d0c 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -1,5 +1,6 @@
 {
   "name": "Python Dev",
+  // !! nezabudni nastaviť aj verziu python pre aplikáciu
   "image": "docker.masara.eu/python:3.13-0.1-devcontainer",
   // "build": {
   //   "dockerfile": "Dockerfile",
@@ -13,7 +14,9 @@
     "PIP_ROOT_USER_ACTION": "ignore"
   },
   "remoteEnv": {
-    "DOCKER_BUILDKIT": "1"
+    "DOCKER_BUILDKIT": "1",
+    // verzia python pre aplikáciu
+    "PYTHON_BASE": "3.13"
   },
   "workspaceFolder": "/workspace",
   "workspaceMount": "source=${localWorkspaceFolder},target=/workspace,type=bind",
diff --git a/Dockerfile b/Dockerfile
index b61933c..16e791f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,7 @@
 # syntax=docker/dockerfile:1.6
-FROM python:3.11-slim
+
+ARG PYTHON_BASE=3.13
+FROM python:${PYTHON_BASE}-slim
 
 ENV PYTHONDONTWRITEBYTECODE=1 \
     PYTHONUNBUFFERED=1 \
@@ -8,45 +10,23 @@ ENV PYTHONDONTWRITEBYTECODE=1 \
     PIP_INDEX_URL=https://dv.masara.eu/repository/pypi-group/simple \
     PIP_NO_INPUT=1
 
-# Základ + Docker repo + docker-ce-cli + compose plugin + git
-RUN set -eux; \
-    apt-get update && \
-    DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
-    ca-certificates curl gnupg && \
-    install -m 0755 -d /etc/apt/keyrings && \
-    curl -fsSL https://download.docker.com/linux/debian/gpg | gpg --dearmor -o /etc/apt/keyrings/docker.gpg && \
-    chmod a+r /etc/apt/keyrings/docker.gpg && \
-    echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] \
-    https://download.docker.com/linux/debian $(. /etc/os-release && echo $VERSION_CODENAME) stable" \
-    > /etc/apt/sources.list.d/docker.list && \
-    apt-get update && \
-    DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
-    build-essential pkg-config \
-    git \
-    docker-ce-cli docker-compose-plugin docker-buildx-plugin \
-    libatomic1 libstdc++6 libgcc-s1 \
-    procps \
-    && rm -rf /var/lib/apt/lists/*
-
-WORKDIR /workspace
-
-ARG APP_USER_ID=1000
-RUN useradd -u ${APP_USER_ID} -m appuser
-
 WORKDIR /app
 
+# Inštalácia závislostí
 COPY requirements.txt .
 RUN --mount=type=cache,target=/root/.cache/pip \
     pip install -r requirements.txt
 
+# Kopírovanie zdrojov
 COPY app/ /app/
-# ak len adresár /app
-RUN chown -R appuser:appuser /app 
-# príklad vytvorenia ďalľieho adresára pre aplikáciu a zmena vlastníctva naraz aj pre /app
-# RUN mkdir -p /models && chown -R appuser:appuser /models /app
+
+# Vytvorenie ne-root usera
+ARG APP_USER_ID=1000
+RUN useradd -u ${APP_USER_ID} -m appuser && \
+    chown -R appuser:appuser /app
 
 USER appuser
 
-# Príklad sprístupnenia a spustenia uvicorn
+# Príklad spustenia
 # EXPOSE 8080
 # CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8080"]