Allow specifying file name using --config parameter

[dpkshrma]

Description

In serverless framework, this issue was raised here: https://github.com/serverless/serverless/issues/4473 and an additional param was added in this PR: https://github.com/serverless/serverless/pull/6216

But, when I tried using the same param with serverless website component: npx serverless deploy --config serverless.dev.yml I got the following error:

 Serverless Error ---------------------------------------
 
  "service" property is missing in serverless.dev.yml

Additional Data

sls components version: 3.4.3 operating system: macos v10.15.7 node version: v14.14.0