where to call install with what

src/backend/Installer.ts

@@ -0,0 +1,34 @@
+import * as Logger from 'log4js'
+
+var exec = require('child-process-promise').exec;
+
+Logger.configure({
+    appenders: 
+    {
+    "installer": { type: 'stdout' },
+    //app: { type: 'file', filename: 'application.log' }
+    },
+    categories: 
+    {
+    default: { appenders: [ 'installer' ], level: 'debug' }
+    }
+})
+const logger = Logger.getLogger("installer") 
+
+export type NPMPkgName = string
+export type NPMVersion = string
+
+export const install = (plugins: Plugin[] = [], npmPkgs: [NPMPkgName, NPMVersion][] = []) => {
+    
+    logger.info("Checking npm dependencies...")
+    const deps = npmPkgs.map((pkg) => {return pkg[0] + '@' + pkg[1]} )
+    exec("npm i --prefix ./plugins " + deps.join(' ')).then(process => {
+    
+        logger.debug(process.stdout)    
+        const Admin = require("./Admin").FrontblockAdmin
+        new Admin(plugins)
+    })
+
+}
+
+install([], [['sqlite3', '4.1.0'], ['knex', '0.19.2']])