added devcontainer.

fix build error, deploy using docker-compose works,
misc changes
using global MQTT instead of local one to tap to already existin broker

.devcontainer/devcontainer.json

@@ -0,0 +1,30 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/javascript-node
+{
+	///"name": "Node.js",
+	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
+	///"image": "mcr.microsoft.com/devcontainers/javascript-node:0-20"
+
+	// Features to add to the dev container. More info: https://containers.dev/features.
+	// "features": {},
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	// "postCreateCommand": "yarn install",
+
+	// Configure tool-specific properties.
+	// "customizations": {},
+
+	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+	// "remoteUser": "root"
+	"name": "garden.iot",
+	"dockerComposeFile": "docker-compose.yml",
+	"service": "node-app",
+	"workspaceFolder": "/workspace",
+	"appPort": 2081,
+	"extensions": [
+	  "dbaeumer.vscode-eslint"
+	]
+}