feat: add devcontainer.json file

Signed-off-by: Xinwei Xiong (cubxxw) <3293172751nss@gmail.com>

.devcontainer /devcontainer.json

@@ -0,0 +1,79 @@
+{
+	// Reference Doc: https://code.visualstudio.com/remote/advancedcontainers/overview
+	"name": "OpenIM Dev Environment",
+	// Update the container version when you publish dev-container
+    "dockerComposeFile": "docker-compose.yml",
+    "build": { "dockerfile": "Dockerfile" },
+	// Replace with uncommented line below to build your own local copy of the image
+	// "dockerFile": "../docker/Dockerfile-dev",
+	"containerEnv": {
+		// Uncomment to overwrite devcontainer .kube/config and .minikube certs with the localhost versions
+		// each time the devcontainer starts, if the respective .kube-localhost/config and .minikube-localhost
+		// folders respectively are bind mounted to the devcontainer.
+		// "SYNC_LOCALHOST_KUBECONFIG": "true"
+
+		// Uncomment to disable docker-in-docker and automatically proxy default /var/run/docker.sock to
+		// the localhost bind-mount /var/run/docker-host.sock.
+		// "BIND_LOCALHOST_DOCKER": "true"
+	},
+	"remoteEnv": {
+		"GO111MODULE": "on",
+		"GOPROXY": "https://goproxy.cn",
+		"GOSUMDB": "sum.golang.org",
+		"GONOPROXY": "github.com/openimsdk",
+		"GONOSUMDB": "github.com/openimsdk",
+		"GOPRIVATE": "github.com/openimsdk"
+	},
+	"extensions": [
+		"davidanson.vscode-markdownlint",
+		"golang.go",
+		"ms-azuretools.vscode-dapr",
+		"ms-azuretools.vscode-docker",
+		"ms-kubernetes-tools.vscode-kubernetes-tools"
+	],
+	"mounts": [
+		// Mount docker-in-docker library volume
+		"type=volume,source=dind-var-lib-docker,target=/var/lib/docker",
+
+		// Bind mount docker socket under an alias to support docker-from-docker
+		"type=bind,source=/var/run/docker.sock,target=/var/run/docker-host.sock",
+
+		// Bind mount docker socket under an alias to support docker-from-docker
+		// "type=bind,source=${env:HOME}${env:USERPROFILE}/.minikube/cache,target=/home/openim/.minikube/cache",
+
+		// Uncomment to clone local .kube/config into devcontainer
+		"type=bind,source=${env:HOME}${env:USERPROFILE}/.kube,target=/home/openim/.kube-localhost"
+
+		// Uncomment to additionally clone minikube certs into devcontainer for use with .kube/config
+		// "type=bind,source=${env:HOME}${env:USERPROFILE}/.minikube,target=/home/openim/.minikube-localhost"
+	],
+	// Always run image-defined default command
+	"overrideCommand": false,
+	// On Linux, this will prevent new files getting created as root, but you
+	// may need to update the USER_UID and USER_GID in docker/Dockerfile-dev
+	// to match your user if not 1000.
+	// "remoteUser": "openimsdk",
+	"runArgs": [
+		// Enable ptrace-based debugging for go
+		"--cap-add=SYS_PTRACE",
+		"--security-opt",
+		"seccomp=unconfined",
+
+		// Uncomment to bind to host network for local devcontainer; this is necessary if using the
+		// bind-mounted /var/run/docker-host.sock directly.
+		"--net=host",
+
+		// Enable docker-in-docker configuration. Comment out if not using for better security.
+		"--privileged",
+
+		// Run the entrypoint defined in container image.
+		"--init"
+	],
+	"settings": {
+		"go.toolsManagement.checkForUpdates": "local",
+		"go.useLanguageServer": true,
+		"go.gopath": "/go"
+	},
+	"workspaceFolder": "/workspaces/openim",
+	"workspaceMount": "type=bind,source=${localWorkspaceFolder},target=/workspaces/openim"
+}