refactor(template): use local filesystem when sls offline is used - no AWS credentials needed

Author: Fuss Florian (uid10804)

README.md

@@ -214,6 +214,12 @@ There are components managed: (under /packages)
 make install
 ```
 
+Lerna will be used to manage the monorepo`s dependencies.
+
+```
+lerna bootstrap
+```
+
 ### Start the server component
 
 ```bash
@@ -224,13 +230,13 @@ the json file will be loaded directly from your local filesystem. No AWS access
 
 ### Start the template component
 
-Mind: Ensure you have AWS credentials in place due to requests to S3 bucket.
+This part is using the serverless offline and is close to how the solution behaves in the cloud.
 
 ```bash
 make start-template
 ```
 
-the json file will be loaded directly from the s3 bucket. This is very close to how the solution behaves in the lambda and aws cloud.
+the json file will be loaded directly from your local filesystem. No AWS access is needed.
 
 ### Start the cli component
 

packages/template/src/handler.ts

@@ -8,6 +8,7 @@ import {
   S3StorageAdapter,
   CloudEnvironment,
   CoreApp,
+  FileStorageAdapter,
 } from 'json-serverless-lib';
 
 import fs from 'fs';
@@ -25,17 +26,28 @@ const swagger = new Swagger(
   './package.json'
 );
 
-const core = new CoreApp(
-  appConfig,
-  server,
-  new S3StorageAdapter(environment.s3Bucket, environment.s3File),
-  swagger,
-  environment
-);
+let core: CoreApp | undefined;
+if (process.env.IS_OFFLINE) {
+  core = new CoreApp(
+    appConfig,
+    server,
+    new FileStorageAdapter('db.json'),
+    swagger,
+    environment
+  );
+} else {
+  core = new CoreApp(
+    appConfig,
+    server,
+    new S3StorageAdapter(environment.s3Bucket, environment.s3File),
+    swagger,
+    environment
+  );
+}
 
 const init = async () => {
   return new Promise(async (resolve, reject) => {
-    await core.setup();
+    await core!.setup();
     resolve();
   });
 };