Add terriajs-plugin-proj4leaflet.

Author: na9da

package.json

@@ -23,7 +23,8 @@
     "url": "http://github.com/TerriaJS/TerriaMap"
   },
   "dependencies": {
-    "terriajs-server": "^4.0.0"
+    "terriajs-server": "^4.0.0",
+    "terriajs-plugin-proj4leaflet": "^0.0.1-alpha.1"
   },
   "config": {
     "docker": {

plugins.ts

@@ -6,6 +6,7 @@ import { TerriaPluginModule } from "terriajs-plugin-api";
 const plugins: () => Promise<TerriaPluginModule>[] = () => [
   // Add plugin imports. Example:
   // import("terriajs-plugin-sample"),
+  import("terriajs-plugin-proj4leaflet")
 ];
 
 export default plugins;