Merge pull request #18 from medved-nsk/feat-optional-server-port

feat: use PORT env variable if provided instead of default (8080)

Author: ngfelixl

README.md

@@ -161,6 +161,8 @@ pending plots are opened in a unique tab and all the data is requested, the
 server shuts down. If you fire another plot the server starts again provides
 your plot and shuts down automatically.
 
+Another port can be provided via PORT environment variable.
+
 ## Contributing
 
 Contributions in all forms are welcome.
@@ -192,4 +194,4 @@ the [website](https://felixlemke.com).
 
 ## Dependencies
 
-- [opn](https://www.npmjs.com/package/opn)
+- [opn](https://www.npmjs.com/package/opn)

src/plot.ts

@@ -2,8 +2,8 @@ import { IPlot, IPlotsContainer } from './models/index';
 import { Layout, Plot } from './models/index';
 import { Server } from './server';
 
-
-const server = new Server(8080);
+const port = Number(process.env.PORT) || 8080;
+const server = new Server(port);
 
 export let plots: IPlot[] = [];
 export const plotContainer: IPlotsContainer = {};
@@ -62,4 +62,4 @@ function validate(data: Plot[], layout?: Layout) {
       throw new TypeError('Layout must be an object');
     }
   }
-}
+}

test/server.spec.ts

@@ -2,7 +2,7 @@ import opn from 'opn';
 import request from 'request';
 import { Server } from '../src/server';
 
-const port = 8080;
+const port = Number(process.env.PORT) || 8080;
 const validData = {
   opened: false,
   pending: false,