Added Xdebug to Docker image development tools with VSCode support

.vscode/launch.json

@@ -0,0 +1,14 @@
+{
+	"version": "0.2.0",
+	"configurations": [
+		{
+			"name": "Listen for Xdebug",
+			"type": "php",
+			"port": 9003,
+			"request": "launch",
+			"pathMappings": {
+				"/var/www/html": "${workspaceFolder}"
+			}
+		}
+	]
+}

docker/Dockerfile.dev

@@ -10,7 +10,15 @@ RUN apk add --no-cache nodejs npm bash supercronic
 # Install some PHP extensions
 ADD --chmod=0755 https://github.com/mlocati/docker-php-extension-installer/releases/latest/download/install-php-extensions /usr/local/bin/
 
-RUN install-php-extensions zip pdo_mysql pdo_pgsql redis intl @composer
+RUN install-php-extensions zip pdo_mysql pdo_pgsql redis intl xdebug @composer
+
+# Configure Xdebug for remote debugging
+# https://xdebug.org/docs/all_settings#mode
+RUN echo "xdebug.mode=develop,debug" >> $PHP_INI_DIR/conf.d/docker-php-ext-xdebug.ini && \
+	echo "xdebug.client_port=9003" >> $PHP_INI_DIR/conf.d/docker-php-ext-xdebug.ini && \
+	echo "xdebug.log=/tmp/xdebug.log" >> $PHP_INI_DIR/conf.d/docker-php-ext-xdebug.ini && \
+	echo "xdebug.start_with_request=yes" >> $PHP_INI_DIR/conf.d/docker-php-ext-xdebug.ini && \
+	echo "xdebug.client_host=host.docker.internal" >> $PHP_INI_DIR/conf.d/docker-php-ext-xdebug.ini
 
 # Set the working directory to the website files
 WORKDIR /var/www/html