Add devcontainer env

.devcontainer/docker-compose.devcontainer.yml

@@ -0,0 +1,8 @@
+services:
+  devcontainer:
+    image: mcr.microsoft.com/devcontainers/base:ubuntu
+    command: sleep infinity
+    volumes:
+      - ..:/workspaces/lunchtime-web:cached
+    working_dir: /workspaces/lunchtime-web
+    init: true