diff --git a/.devcontainer/.env b/.devcontainer/.env
index 0083f06..d9abf75 100644
--- a/.devcontainer/.env
+++ b/.devcontainer/.env
@@ -1,4 +1,5 @@
 PYTHON_BASE=3.13
+DEVCONTAINER_IMAGE_REV=0.1
 DEVCONTAINER_IMAGE_PULL_REPO=docker.masara.eu/python
 DEVCONTAINER_IMAGE_PUSH_REPO=repo.masara.eu/python
-DEVCONTAINER_IMAGE_REV=0.1
+
diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index a186588..2a173f2 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -1,29 +1,29 @@
-# Používame oficiálny Python image, ale env bude podobné ako v base:ubuntu
-ARG PYTHON_VERSION=3.13
-FROM python:${PYTHON_VERSION}-slim
-
-ENV PYTHONUNBUFFERED=1 \
-    PIP_NO_CACHE_DIR=1 \
-    PIP_DISABLE_PIP_VERSION_CHECK=1 
-
-# Základ + Docker repo + docker-ce-cli + compose plugin + git
-RUN set -eux; \
-    apt-get update && \
-    DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
-    ca-certificates curl gnupg && \
-    install -m 0755 -d /etc/apt/keyrings && \
-    curl -fsSL https://download.docker.com/linux/debian/gpg | gpg --dearmor -o /etc/apt/keyrings/docker.gpg && \
-    chmod a+r /etc/apt/keyrings/docker.gpg && \
-    echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] \
-    https://download.docker.com/linux/debian $(. /etc/os-release && echo $VERSION_CODENAME) stable" \
-    > /etc/apt/sources.list.d/docker.list && \
-    apt-get update && \
-    DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
-    build-essential pkg-config \
-    git \
-    docker-ce-cli docker-compose-plugin docker-buildx-plugin \
-    libatomic1 libstdc++6 libgcc-s1 \
-    procps \
-    && rm -rf /var/lib/apt/lists/*
-
-WORKDIR /workspace
+# Používame oficiálny Python image, ale env bude podobné ako v base:ubuntu
+ARG PYTHON_VERSION=3.13
+FROM python:${PYTHON_VERSION}-slim
+
+ENV PYTHONUNBUFFERED=1 \
+    PIP_NO_CACHE_DIR=1 \
+    PIP_DISABLE_PIP_VERSION_CHECK=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 $VERSION_CODENAME) stable" \
+    > /etc/apt/sources.list.d/docker.list && \
+    apt-get update && \
+    DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+    build-essential pkg-config \
+    git \
+    docker-ce-cli docker-compose-plugin docker-buildx-plugin \
+    libatomic1 libstdc++6 libgcc-s1 \
+    procps \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /workspace
diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index 0b494b1..9218046 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -1,49 +1,53 @@
-{
-  "name": "Python Dev",
-  "dockerComposeFile": "docker-compose.yml",
-  "service": "dev",
-  "containerEnv": {
-    "PIP_INDEX_URL": "https://dv.masara.eu/repository/pypi-group/simple",
-    "PIP_ROOT_USER_ACTION": "ignore"
-  },
-  "remoteEnv": {
-    "DOCKER_BUILDKIT": "1"
-  },
-  "workspaceFolder": "/workspace",
-  "remoteUser": "root",
-  "customizations": {
-    "vscode": {
-      "extensions": [
-        "ms-python.python",
-        "ms-python.vscode-pylance",
-        "ms-toolsai.jupyter",
-        "ms-python.black-formatter",
-        "ms-python.isort",
-        "ms-azuretools.vscode-docker"
-      ],
-      "settings": {
-        "python.formatting.provider": "black",
-        "python.analysis.extraPaths": [
-          "${workspaceFolder}/app"
-        ],
-        "editor.formatOnSave": true,
-        "python.terminal.activateEnvironment": true,
-        "python.defaultInterpreterPath": ".venv/bin/python",
-        "remote.restoreForwardedPorts": false,
-        "remote.autoForwardPortsSource": "output",
-        "debug.javascript.autoAttachFilter": "disabled"
-      }
-    }
-  },
-  "mounts": [
-    "type=bind,source=/var/run/docker.sock,target=/var/run/docker.sock"
-  ],
-  "postCreateCommand": "bash .devcontainer/post_create.sh",
-  "forwardPorts": [
-  ],
-  "portsAttributes": {
-    "*": {
-      "onAutoForward": "ignore"
-    }
-  }
-}
+{
+    "name": "Python Dev",
+    "containerEnv": {
+        "PIP_INDEX_URL": "https://dv.masara.eu/repository/pypi-group/simple",
+        "PIP_ROOT_USER_ACTION": "ignore"
+    },
+    "remoteEnv": {
+        "DOCKER_BUILDKIT": "1",
+        "VIRTUAL_ENV": "/workspace/.venv",
+        "PATH": "/workspace/.venv/bin:${containerEnv:PATH}"
+    },
+    "workspaceFolder": "/workspace",
+    "remoteUser": "root",
+    "overrideCommand": true,
+    "customizations": {
+        "vscode": {
+            "extensions": [
+                "ms-python.python",
+                "ms-python.vscode-pylance",
+                "ms-toolsai.jupyter",
+                "ms-python.black-formatter",
+                "ms-python.isort",
+                "ms-azuretools.vscode-docker",
+                "openai.chatgpt"
+            ],
+            "settings": {
+                "python.formatting.provider": "black",
+                "python.analysis.extraPaths": [
+                    "${workspaceFolder}/app"
+                ],
+                "editor.formatOnSave": true,
+                "python.terminal.activateEnvironment": true,
+                "python.defaultInterpreterPath": ".venv/bin/python",
+                "remote.restoreForwardedPorts": false,
+                "remote.autoForwardPortsSource": "output",
+                "debug.javascript.autoAttachFilter": "disabled"
+            }
+        }
+    },
+    "mounts": [
+        "type=bind,source=/var/run/docker.sock,target=/var/run/docker.sock",
+        "type=bind,source=${localEnv:USERPROFILE}/.codex,target=/root/.codex"
+    ],
+    "postCreateCommand": "bash .devcontainer/post_create.sh",
+    "forwardPorts": [],
+    "portsAttributes": {
+        "*": {
+            "onAutoForward": "ignore"
+        }
+    },
+    "image": "docker.masara.eu/python:3.13-0.1-devcontainer",
+    "workspaceMount": "source=${localWorkspaceFolder},target=/workspace,type=bind,consistency=cached"
+}
diff --git a/.devcontainer/docker-compose.yml b/.devcontainer/docker-compose.yml
index d359b99..50e46ec 100644
--- a/.devcontainer/docker-compose.yml
+++ b/.devcontainer/docker-compose.yml
@@ -1,9 +1,11 @@
-services:
+services:
   dev:
     image: ${DEVCONTAINER_IMAGE_PULL_REPO}:${PYTHON_BASE}-${DEVCONTAINER_IMAGE_REV}-devcontainer
     pull_policy: always
     init: true
+    command: sleep infinity
+    tty: true
     volumes:
       - ..:/workspace:cached
     environment:
-      PYTHON_BASE: ${PYTHON_BASE}
+      PYTHON_BASE: ${PYTHON_BASE}
diff --git a/.devcontainer/post_create.sh b/.devcontainer/post_create.sh
index de96a24..ffa6d69 100644
--- a/.devcontainer/post_create.sh
+++ b/.devcontainer/post_create.sh
@@ -7,24 +7,29 @@ VENV_PATH="/workspace/.venv"
 if [ ! -d "$VENV_PATH" ]; then
     echo "Virtuálne prostredie neexistuje – vytváram..."
     python -m venv "$VENV_PATH"
-
-    echo "Aktivujem virtuálne prostredie..."
-    # shellcheck disable=SC1090
-    source "$VENV_PATH/bin/activate"
-
-    echo "Aktualizujem pip a základné nástroje..."
-    pip install --upgrade pip setuptools wheel
 else
     echo "Používam existujúce virtuálne prostredie..."
-    # shellcheck disable=SC1090
-    # source "$VENV_PATH/bin/activate"
 fi
 
+echo "Aktivujem virtuálne prostredie..."
+# shellcheck disable=SC1090
+source "$VENV_PATH/bin/activate"
+
+echo "Aktualizujem pip a základné nástroje..."
+python -m pip install --upgrade pip setuptools wheel
+
 # Inštalácia závislostí, ak existuje requirements.txt
 if [ -f "/workspace/requirements.txt" ]; then
     echo "Inštalujem závislosti z requirements.txt..."
-    pip install -r /workspace/requirements.txt
+    python -m pip install -r /workspace/requirements.txt
 else
     echo "requirements.txt nenájdený – preskakujem inštaláciu závislostí."
 fi
 
+# Ak sa terminál otvorí skôr, než Python extension stihne auto-aktiváciu,
+# zabezpečíme aktiváciu aj cez shell init.
+BASHRC="/root/.bashrc"
+ACTIVATE_LINE='[ -f /workspace/.venv/bin/activate ] && source /workspace/.venv/bin/activate'
+if ! grep -Fq "$ACTIVATE_LINE" "$BASHRC"; then
+    echo "$ACTIVATE_LINE" >> "$BASHRC"
+fi
diff --git a/.dockerignore b/.dockerignore
index 0ce478c..3de2c41 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -1,16 +1,16 @@
-
-__pycache__
-*.pyc
-*.pyo
-*.pyd
-*.db
-*.sqlite3
-.env
-*.log
-.git
-.gitignore
-.vscode
-.venv
-venv
-rest
-docker
+
+__pycache__
+*.pyc
+*.pyo
+*.pyd
+*.db
+*.sqlite3
+.env
+*.log
+.git
+.gitignore
+.vscode
+.venv
+venv
+rest
+docker
diff --git a/.vscode/tasks.json b/.vscode/tasks.json
index 5773c64..9889460 100644
--- a/.vscode/tasks.json
+++ b/.vscode/tasks.json
@@ -27,4 +27,4 @@
       "problemMatcher": []
     }
   ]
-}
+}
diff --git a/Dockerfile b/Dockerfile
index 16e791f..344e20d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,32 +1,32 @@
-# syntax=docker/dockerfile:1.6
-
-ARG PYTHON_BASE=3.13
-FROM python:${PYTHON_BASE}-slim
-
-ENV PYTHONDONTWRITEBYTECODE=1 \
-    PYTHONUNBUFFERED=1 \
-    PIP_NO_CACHE_DIR=1 \
-    PIP_DISABLE_PIP_VERSION_CHECK=1 \
-    PIP_INDEX_URL=https://dv.masara.eu/repository/pypi-group/simple \
-    PIP_NO_INPUT=1
-
-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/
-
-# Vytvorenie ne-root usera
-ARG APP_USER_ID=1000
-RUN useradd -u ${APP_USER_ID} -m appuser && \
-    chown -R appuser:appuser /app
-
-USER appuser
-
-# Príklad spustenia
-# EXPOSE 8080
-# CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8080"]
+# syntax=docker/dockerfile:1.6
+
+ARG PYTHON_BASE=3.13
+FROM python:${PYTHON_BASE}-slim
+
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1 \
+    PIP_NO_CACHE_DIR=1 \
+    PIP_DISABLE_PIP_VERSION_CHECK=1 \
+    PIP_INDEX_URL=https://dv.masara.eu/repository/pypi-group/simple \
+    PIP_NO_INPUT=1
+
+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/
+
+# Vytvorenie ne-root usera
+ARG APP_USER_ID=1000
+RUN useradd -u ${APP_USER_ID} -m appuser && \
+    chown -R appuser:appuser /app
+
+USER appuser
+
+# Príklad spustenia
+# EXPOSE 8080
+# CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8080"]
diff --git a/app/main.py b/app/main.py
index 7ccb890..5122182 100644
--- a/app/main.py
+++ b/app/main.py
@@ -1,2 +1,2 @@
-# hello_world.py
+# hello_world.py
 print("Hello, world!")
\ No newline at end of file
diff --git a/scripts/publish-devcontainer-image.ps1 b/scripts/publish-devcontainer-image.ps1
index 96d5540..f14b14a 100644
--- a/scripts/publish-devcontainer-image.ps1
+++ b/scripts/publish-devcontainer-image.ps1
@@ -71,4 +71,4 @@ if ($LASTEXITCODE -ne 0) {
 if ($Push) {
   Invoke-DockerPushWithLoginFallback -Tag $versionTag -Registry $registry
   Invoke-DockerPushWithLoginFallback -Tag $channelTag -Registry $registry
-}
+}