Adding a delay to poststart command to try to avoid func error

Author: kylebunting

.devcontainer/devcontainer.json

@@ -8,7 +8,9 @@
         },
         "ghcr.io/devcontainers/features/common-utils": {},
         "ghcr.io/devcontainers/features/docker-in-docker:2": {},
-        "ghcr.io/devcontainers/features/dotnet:2": "8.0",
+        "ghcr.io/devcontainers/features/dotnet:2": {
+            "version": "8.0"
+        },
         "ghcr.io/devcontainers/features/git:1": {},
         "ghcr.io/devcontainers/features/github-cli:1": {},
         "ghcr.io/devcontainers/features/node:1": {
@@ -35,9 +37,8 @@
             }
         }
     },
-    "onCreateCommand": "npm install -g azure-functions-core-tools@4 --unsafe-perm true",
-    "postCreateCommand": "chmod +x ./infra/azd-hooks/preprovision.sh",
-    "postStartCommand": "cd ./chainlit && python -m venv .venv && . .venv/bin/activate && pip install -r requirements.txt",
+    "postCreateCommand": "npm install -g azure-functions-core-tools@4 --unsafe-perm true && chmod +x ./infra/azd-hooks/preprovision.sh",
+    "postStartCommand": "cd ./chainlit && python -m venv .venv && . .venv/bin/activate && pip install -r requirements.txt && sleep 30",
     "remoteUser": "vscode",
     "forwardPorts": [
         7071,