Update dev container workspace path and mounting configuration

Moves the workspace volume mount from the docker-compose file to devcontainer.json and standardizes the workspace path to /workspace.

.devcontainer/devcontainer.json

@@ -5,7 +5,8 @@
     "docker-compose.devcontainer.yml"
   ],
   "service": "workspace",
-  "workspaceFolder": "/workspaces/fog",
+  "workspaceFolder": "/workspace",
+  "workspaceMount": "source=${localWorkspaceFolder},target=/workspace,type=bind,consistency=cached",
   "runServices": ["workspace", "postgres", "redis"],
   "shutdownAction": "stopCompose",
   "remoteUser": "node",

.devcontainer/docker-compose.devcontainer.yml

@@ -4,8 +4,6 @@ services:
   workspace:
     image: mcr.microsoft.com/devcontainers/javascript-node:1-20-bookworm
     command: sleep infinity
-    volumes:
-      - ..:/workspaces/fog:cached
     depends_on:
       postgres:
         condition: service_healthy