diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index 2ee11f5..0dcbd04 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -2,9 +2,9 @@
 // README at: https://github.com/devcontainers/templates/tree/main/src/php
 {
 	"name": "PHP",
-	"build": {
-		"dockerfile": "Dockerfile"
-	},
+	"dockerComposeFile": "docker-compose.yml",
+	"service": "app",
+	"workspaceFolder": "/var/www/html",
 	"features": {
 		"ghcr.io/devcontainers/features/git:1": {}
 	},
diff --git a/.devcontainer/docker-compose.yml b/.devcontainer/docker-compose.yml
new file mode 100644
index 0000000..3f58d9c
--- /dev/null
+++ b/.devcontainer/docker-compose.yml
@@ -0,0 +1,36 @@
+version: "3.8"
+
+services:
+  app:
+    build:
+      context: .
+      dockerfile: Dockerfile
+
+    volumes:
+      - ../:/workspaces:cached
+
+    # Overrides default command so things don't shut down after the process ends.
+    command: sleep infinity
+
+    # Runs app on the same network as the database container, allows "forwardPorts" in devcontainer.json function.
+    network_mode: service:db
+
+    # Use "forwardPorts" in **devcontainer.json** to forward an app port locally.
+    # (Adding the "ports" property to this file will not forward from a Codespace.)
+
+  db:
+    image: mariadb:10.4
+    restart: unless-stopped
+    volumes:
+      - mariadb-data:/var/lib/mysql
+    environment:
+      MYSQL_ROOT_PASSWORD: mariadb
+      MYSQL_DATABASE: mariadb
+      MYSQL_USER: mariadb
+      MYSQL_PASSWORD: mariadb
+
+    # Add "forwardPorts": ["3306"] to **devcontainer.json** to forward MariaDB locally.
+    # (Adding the "ports" property to this file will not forward from a Codespace.)
+
+volumes:
+  mariadb-data: