Added devcontainer for .NET 6

.devcontainer/devcontainer.json

@@ -0,0 +1,20 @@
+{
+  "name": "EventFlow Framework",
+  "service": "event-flow-framework",
+  "dockerComposeFile": ["./docker-compose.yml"],
+  "settings": {},
+  "extensions": [
+    "ms-dotnettools.csharp",
+    "streetsidesoftware.code-spell-checker",    
+    "k--kato.docomment",
+    "editorconfig.editorconfig",
+    "heaths.vscode-guid",
+    "jchannon.csharpextensions",
+    "aaron-bond.better-comments",
+    "kiteco.kite",
+    "esbenp.prettier-vscode"
+    ],
+  "workspaceFolder": "/workspace",
+  "remoteUser": "vscode",
+  "shutdownAction": "none"
+}

.devcontainer/docker-compose.yml

@@ -0,0 +1,17 @@
+version: "3.9"
+networks:
+  development:
+    external: true
+services:
+  event-flow-framework:
+    container_name: event-flow-framework
+    ports:
+      - 6000:6000
+    volumes:
+      - ../:/workspace:cached
+    build:  
+      context: ../
+      dockerfile: ./.devcontainer/dockerfile
+    command: /bin/sh -c "while sleep 1000; do :; done"
+    networks:
+      - development

.devcontainer/dockerfile

@@ -0,0 +1,5 @@
+ARG VARIANT="6.0"
+FROM mcr.microsoft.com/vscode/devcontainers/dotnet:0-${VARIANT}
+
+ARG NODE_VERSION="none"
+RUN if [ "${NODE_VERSION}" != "none" ]; then su vscode -c "umask 0002 && . /usr/local/share/nvm/nvm.sh && nvm install ${NODE_VERSION} 2>&1"; fi