sqlite3 and psql support

backend/db.js

@@ -4,19 +4,27 @@ if (!config.has('database')) {
 	throw new Error('Database config does not exist! Please read the instructions: https://github.com/jc21/nginx-proxy-manager/blob/master/doc/INSTALL.md');
 }
 
-let data = {
-	client:     config.database.engine,
-	connection: {
-		host:     config.database.host,
-		user:     config.database.user,
-		password: config.database.password,
-		database: config.database.name,
-		port:     config.database.port
-	},
-	migrations: {
-		tableName: 'migrations'
-	}
-};
+function generateDbConfig() {
+	if (config.database.engine === 'knex-native') {
+		return config.database.knex;
+	} else
+		return {
+			client:     config.database.engine,
+			connection: {
+				host:     config.database.host,
+				user:     config.database.user,
+				password: config.database.password,
+				database: config.database.name,
+				port:     config.database.port
+			},
+			migrations: {
+				tableName: 'migrations'
+			}
+		};
+}
+
+
+let data = generateDbConfig();
 
 if (typeof config.database.version !== 'undefined') {
 	data.version = config.database.version;