change context

Signed-off-by: Aaron Wislang <aaron.wislang@microsoft.com>

Author: asw101

.devcontainer/docker/devcontainer.json

@@ -1,5 +1,8 @@
 {
-    "build": { "dockerfile": "Dockerfile" },
+    "build": { 
+        "dockerfile": "Dockerfile",
+        "context": "../../"
+    },
     //"image": "mcr.microsoft.com/devcontainers/universal:2",
     "features": {
         "ghcr.io/devcontainers/features/rust:1": {},