Fix some issues

- add LICENSE
- switch from node-static to serve-static due to numerous vulnerabilities unfixed for years
- update README
- make type checking more strict
- fix RoomList.get if room does not exist

LICENSE

@@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright (c) 2020 Thomas Weber
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

@@ -1,6 +1,27 @@
-This is a cloud data server for forkphorus.
+# cloud-server
 
- - this is not a reimplementation of the Scratch cloud data server
- - this does not implement the same protocol as the Scratch cloud data server
- - this is not a "permanent"/"long term" data server, all "rooms" are short lived and destructible
- - this is not used by or part of Scratch, obviously
+This is a cloud data server for [forkphorus](https://forkphorus.github.io/).
+
+## This is not
+
+ - a reimplementation of the Scratch cloud data server (protocols have several differences)
+ - a "permanent" or "long term" data server, all "rooms" are removed when they are empty for a while
+
+## Setup
+
+Needs Node.js and npm.
+
+```
+git clone https://github.com/forkphorus/cloud-server
+cd cloud-server
+npm install
+npm start
+```
+
+## Configuration
+
+HTTP requests are served static files from the public directory.
+
+Change the PORT environment variable (or PORT in src/config.js) to change the port.
+
+If you use a proxy such as nginx set the TRUST_PROXY environment variable (or TRUST_PROXY in src/config.js) to `true` to make log messages include the correct IP addresses.