feat: Upgrade devcontainer setup (#14419)

* Feat: Upgrade devcontainer

* Style: Format devcontainer.json

* Chore: Remove settings from devcontainer

* chore: add shebang

* chore: fix shellcheck

---------

Co-authored-by: Bünyamin Olgun <buenyamin.olgun@cancom.de>
Co-authored-by: Jason Rasmussen <jason@rasm.me>

.devcontainer/docker-compose.yml

@@ -0,0 +1,8 @@
+services:
+  immich-devcontainer:
+    build:
+      dockerfile: Dockerfile
+    extra_hosts:
+      - 'host.docker.internal:host-gateway'
+    volumes:
+      - ..:/immich:cached