Implemented content upload app with tests and pre-commit hooks

.devcontainer/Dockerfile

@@ -0,0 +1 @@
+FROM mcr.microsoft.com/devcontainers/base:ubuntu

.devcontainer/devcontainer.json

@@ -0,0 +1,29 @@
+{
+  "name": "Python + uv",
+  "dockerComposeFile": "./docker-compose.yml",
+  "service": "app",
+  "workspaceFolder": "/workspace",
+  "remoteUser": "vscode",
+  "features": {
+    "ghcr.io/devcontainers-extra/features/uv:1": {}
+  },
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "ms-python.python",
+        "ms-python.vscode-pylance",
+        "charliermarsh.ruff",
+        "ms-python.mypy-type-checker",
+        "ms-toolsai.jupyter"
+      ]
+    }
+  },
+  "remoteEnv": {
+    "PROJECT_NAME": "Python + uv",
+    "PYTHON_VERSION": "3.13",
+    "UV_INIT_BARE": "false",
+    "INSTALL_IPYKERNEL": "false"
+  },
+  "postCreateCommand": "make post-create",
+  "mounts": []
+}

.devcontainer/docker-compose.yml

@@ -0,0 +1,10 @@
+version: '3.8'
+
+services:
+  app:
+    build: .
+    image: python_playground
+    container_name: python_playground
+    volumes:
+      - ..:/workspace:cached
+    command: sleep infinity

.devcontainer/test_tools.sh

@@ -0,0 +1,70 @@
+#!/bin/bash
+
+PROJECT_NAME=${PROJECT_NAME:-Python + uv}
+
+echo "=== Testing Installed Tools ==="
+echo "Run date: $(date -Is)"
+echo
+
+echo "Documentation: Tools included in ${PROJECT_NAME} devcontainer"
+echo "================================================================"
+echo
+echo "Core Tools (from Ubuntu base + uv feature):"
+echo "  - uv: Python package manager"
+echo "  - bash: Shell"
+echo "  - git: Version control"
+echo "  - curl: Data transfer/downloads"
+echo "  - wget: Downloads"
+echo "  - build-essential: C/C++ compiler, make, build tools"
+echo "  - apt: Package manager"
+echo "  - openssh-client: SSH tools"
+echo "  - gnupg: Encryption/signing"
+echo "  - zip/unzip: Archive tools"
+echo "  - Standard utilities: grep, sed, awk, cut, sort, find, etc."
+echo
+echo "Note: Python is NOT pre-installed. Use 'uv python install' to add it."
+echo
+echo "=== Running Tool Tests ==="
+echo
+
+report_tool() {
+	local name="$1"; shift
+	local cmd="$*"
+	if command -v "$name" >/dev/null 2>&1; then
+		if [ -n "$cmd" ]; then
+			local v
+			v=$($cmd 2>/dev/null | head -1)
+			echo "✅ ${name}: ${v}"
+		else
+			echo "✅ ${name}: available"
+		fi
+	else
+		echo "❌ ${name}: not found"
+	fi
+}
+
+report_tool uv "uv --version"
+report_tool python "python --version"
+report_tool bash "bash --version"
+report_tool zsh "zsh --version"
+report_tool git "git --version"
+report_tool zip "zip --version"
+report_tool unzip "unzip -v"
+report_tool grep "grep --version"
+report_tool sed "sed --version"
+report_tool awk "awk --version"
+report_tool find "find --version"
+report_tool cut "cut --version"
+report_tool sort "sort --version"
+report_tool cat
+report_tool ls
+report_tool mkdir
+report_tool rm
+echo
+
+echo "=== Test Complete ==="
+
+# Final summary
+echo "✅ Apps are ready for '${PROJECT_NAME}'"
+echo "   Using python-uv devcontainer template"
+echo "   https://github.com/metinsenturk/devcontainer-templates/tree/main/src/python-uv"