Set up devcontainer for local dev

Add a complete devcontainer setup to enable one-click development
environment setup in VS Code with all dependencies and services
pre-configured.

.devcontainer/Dockerfile

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+FROM php:8.2-apache
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y \
+	git \
+	curl \
+	libpng-dev \
+	libonig-dev \
+	libxml2-dev \
+	libzip-dev \
+	libicu-dev \
+	sqlite3 \
+	libsqlite3-dev \
+	unzip \
+	nodejs \
+	npm \
+	&& apt-get clean \
+	&& rm -rf /var/lib/apt/lists/*
+
+# Install PHP extensions
+RUN docker-php-ext-configure gd \
+	&& docker-php-ext-install -j$(nproc) \
+	gd \
+	intl \
+	pdo \
+	pdo_sqlite \
+	mbstring \
+	zip \
+	fileinfo
+
+# Enable Apache modules
+RUN a2enmod rewrite
+
+# Install Composer
+COPY --from=composer:latest /usr/bin/composer /usr/bin/composer
+
+# Install Yarn
+RUN npm install -g yarn
+
+# Set working directory
+WORKDIR /workspaces/grocy
+
+# Configure Apache to point to public directory
+ENV APACHE_DOCUMENT_ROOT=/workspaces/grocy/public
+RUN sed -ri -e 's!/var/www/html!${APACHE_DOCUMENT_ROOT}!g' /etc/apache2/sites-available/*.conf
+RUN sed -ri -e 's!/var/www/!${APACHE_DOCUMENT_ROOT}!g' /etc/apache2/apache2.conf /etc/apache2/conf-available/*.conf
+
+# Set permissions for data directory
+RUN mkdir -p /workspaces/grocy/data && chmod 777 /workspaces/grocy/data

.devcontainer/devcontainer.json

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+{
+	"name": "Grocy Development",
+	"build": {
+		"dockerfile": "Dockerfile",
+		"context": "."
+	},
+	"forwardPorts": [
+		80
+	],
+	"postCreateCommand": "bash -c 'composer install && yarn install && if [ ! -f data/config.php ]; then cp config-dist.php data/config.php; fi && chmod -R 777 data'",
+	"postStartCommand": "apache2-foreground &",
+	"customizations": {
+		"vscode": {
+			"settings": {
+				"php.validate.executablePath": "/usr/local/bin/php"
+			}
+		}
+	},
+	"remoteUser": "root"
+}

.vscode/extensions.json

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+{
+	"recommendations": [
+		"bmewburn.vscode-intelephense-client",
+		"xdebug.php-debug",
+		"editorconfig.editorconfig"
+	]
+}