feat: add fullstack TypeScript template with Docker support

- Created package.json for managing workspaces (frontend and backend)
- Added scripts for development, build, testing, and Docker operations
- Implemented kill-dev-processes.sh script to terminate development processes gracefully

.devcontainer/Dockerfile

@@ -0,0 +1,25 @@
+FROM node:18
+
+# Install git and other useful tools
+RUN apt-get update && apt-get install -y \
+    git \
+    curl \
+    vim \
+    && rm -rf /var/lib/apt/lists/*
+
+# Set working directory
+WORKDIR /workspace
+
+# Install global packages
+RUN npm install -g typescript ts-node nodemon
+
+# Create user with same UID as host (for file permissions)
+ARG USERNAME=node
+ARG USER_UID=1000
+ARG USER_GID=$USER_UID
+
+RUN groupmod --gid $USER_GID $USERNAME \
+    && usermod --uid $USER_UID --gid $USER_GID $USERNAME \
+    && chown -R $USER_UID:$USER_GID /home/$USERNAME
+
+USER $USERNAME

.devcontainer/devcontainer.json

@@ -0,0 +1,42 @@
+{
+  "name": "Fotodrucker Full Stack",
+  "build": {
+    "dockerfile": "Dockerfile"
+  },
+  "workspaceFolder": "/workspace",
+  "workspaceMount": "source=${localWorkspaceFolder},target=/workspace,type=bind,consistency=cached",
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "ms-vscode.vscode-typescript-next",
+        "esbenp.prettier-vscode",
+        "ms-vscode.vscode-json",
+        "bradlc.vscode-tailwindcss",
+        "ms-vscode.vscode-eslint",
+        "ms-vscode-remote.remote-containers"
+      ],
+      "settings": {
+        "typescript.preferences.includePackageJsonAutoImports": "auto",
+        "editor.formatOnSave": true,
+        "editor.defaultFormatter": "esbenp.prettier-vscode"
+      }
+    }
+  },
+  "postCreateCommand": "cd backend && npm install && cd ../frontend && npm install",
+  "forwardPorts": [3000, 3001, 9229, 9230],
+  "portsAttributes": {
+    "3000": {
+      "label": "Frontend (React)",
+      "onAutoForward": "openBrowser"
+    },
+    "3001": {
+      "label": "Backend (Express)"
+    },
+    "9229": {
+      "label": "Backend Debug Port"
+    },
+    "9230": {
+      "label": "Frontend Debug Port"
+    }
+  }
+}

.devcontainer/docker-compose.yml

@@ -0,0 +1,16 @@
+version: '3.8'
+
+services:
+  app:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    volumes:
+      - ..:/workspace:cached
+    ports:
+      - "3000:3000"
+      - "3001:3001" 
+      - "9229:9229"
+      - "9230:9230"
+    command: sleep infinity
+    working_dir: /workspace