add devcontainer_example.json

devcontainer_example.json

+{
+    "name": ".NET",
+    "workspaceFolder": "/workdir",
+    "workspaceMount": "source=${localWorkspaceFolder},target=/workdir,type=bind,consistency=delegated",
+    "remoteUser": "vscode",
+    "image": "andrijoos/devcontainer-dotnet:8.0",
+    "customizations": {
+        "vscode": {
+            "extensions": [
+                "ms-azuretools.vscode-docker",
+                "ms-dotnettools.csdevkit",
+                "hbenl.vscode-test-explorer"
+            ]
+        }
+    },
+    "containerEnv": {
+        "SHELL": "/bin/bash"
+    },
+    "postCreateCommand": "dotnet restore"
+}