updated readme. made redis optional in dev

README.md

@@ -16,17 +16,23 @@ A file sharing experiment which allows you to send encrypted files to other user
 ## Requirements
 
 - [Node.js 8.2+](https://nodejs.org/)
-- [Redis server](https://redis.io/)
+- [Redis server](https://redis.io/) (optional for development)
+- [AWS S3](https://aws.amazon.com/s3/) or compatible service. (optional)
 
-**NOTE:** To run the project, make sure you have a Redis server running locally:
+---
+
+## Development
+
+To start an ephemeral development server run:
 
 ```sh
-$ redis-server /usr/local/etc/redis.conf
+npm install
+npm start
 ```
 
 ---
 
-## How to use it
+## Commands
 
 | Command          | Description |
 |------------------|-------------|
@@ -39,6 +45,12 @@ $ redis-server /usr/local/etc/redis.conf
 
 ---
 
+## Configuration
+
+The server is configured with environment variables. See [server/config.js] for all options and [docs/docker.md](doc/docker.md) for examples.
+
+---
+
 ## Localization
 
 Firefox Send localization is managed via [Pontoon](https://pontoon.mozilla.org/projects/test-pilot-firefox-send/), not direct pull requests to the repository. If you want to fix a typo, add a new language, or simply know more about localization, please get in touch with the [existing localization team](https://pontoon.mozilla.org/teams/) for your language, or Mozilla’s [l10n-drivers](https://wiki.mozilla.org/L10n:Mozilla_Team#Mozilla_Corporation) for guidance.

package-lock.json

@@ -9423,6 +9423,12 @@
       "resolved": "https://registry.npmjs.org/redis-commands/-/redis-commands-1.3.1.tgz",
       "integrity": "sha1-gdgm9F+pyLIBH0zXoP5ZfSQdRCs="
     },
+    "redis-mock": {
+      "version": "0.20.0",
+      "resolved": "https://registry.npmjs.org/redis-mock/-/redis-mock-0.20.0.tgz",
+      "integrity": "sha1-lKOVhlurvOv1OLa1mUFyPkgHMBA=",
+      "dev": true
+    },
     "redis-parser": {
       "version": "2.6.0",
       "resolved": "https://registry.npmjs.org/redis-parser/-/redis-parser-2.6.0.tgz",

package.json

@@ -76,6 +76,7 @@
     "prettier": "^1.5.3",
     "proxyquire": "^1.8.0",
     "raven-js": "^3.17.0",
+    "redis-mock": "^0.20.0",
     "require-from-string": "^1.2.1",
     "rimraf": "^2.6.1",
     "selenium-webdriver": "^3.5.0",

server/storage.js

@@ -10,7 +10,12 @@ const mozlog = require('./log');
 
 const log = mozlog('send.storage');
 
-const redis = require('redis');
+const redis_lib =
+  config.env === 'development' && config.redis_host === 'localhost'
+    ? 'redis-mock'
+    : 'redis';
+
+const redis = require(redis_lib);
 const redis_client = redis.createClient({
   host: config.redis_host,
   connect_timeout: 10000