removed dependency from yarn. Only npm will be supported from now

docs/installation.md

@@ -3,13 +3,13 @@
 
 ## Running BGPalerter from binaries
 
-1. Download the binary [here](https://github.com/nttgin/BGPalerter/releases) (be sure to select the one for your OS)
+1. Download the binary [here](https://github.com/nttgin/BGPalerter/releases) (be sure to select the one for your OS).
 
-2. Download [`config.yml.example`](https://raw.githubusercontent.com/nttgin/BGPalerter/master/config.yml.example) as `config.yml` and [`prefixes.yml.example`](https://raw.githubusercontent.com/nttgin/BGPalerter/master/prefixes.yml.example) as `prefixes.yml`, and place them in the same directory of the executable (if you skip this step, some default configuration files will be generated during the first execution)
+2. Download [`config.yml.example`](https://raw.githubusercontent.com/nttgin/BGPalerter/master/config.yml.example) as `config.yml` and [`prefixes.yml.example`](https://raw.githubusercontent.com/nttgin/BGPalerter/master/prefixes.yml.example) as `prefixes.yml`, and place them in the same directory of the executable (if you skip this step, some default configuration files will be generated during the first execution).
 
-3. Modify `prefixes.yml` and add the prefixes you want to monitor (or see below how to auto generate this file)
+3. Modify `prefixes.yml` and add the prefixes you want to monitor (or see below how to auto generate this file).
 
-4. Run the executable (e.g. `chmod 700 bgpalerter-linux-x64 && nohup ./bgpalerter-linux-x64 &`)
+4. Run the executable (e.g. `chmod 700 bgpalerter-linux-x64 && nohup ./bgpalerter-linux-x64 &`).
 
 5. See the alerts in `logs/reports-YYYY-MM-DD.log` (e.g. `tail -f logs/reports*`)
 
@@ -22,10 +22,10 @@ If you enable email reporting, download also the directory `reports/email_templa
 ## Running BGPalerter from the source code
 
 
-1. git clone this repo
+1. Git clone this repo.
 
-2. install Node.js (version >= 10.16) and npm ([installing node and npm](https://nodejs.org/en/download/))
+2. Install Node.js (version >= 10.16) and npm ([installing node and npm](https://nodejs.org/en/download/)).
 
-3. execute `npm install` or `yarn` to install all dependencies ([installing yarn](https://yarnpkg.com/lang/en/docs/install))
+3. Execute `npm install` to install all dependencies.
 
-4. run `npm run watch-and-serve` to run the application. At every file change it will self-reload.
+4. Run `npm run watch-and-serve` to run the application. At every file change it will self-reload.

package-lock.json

@@ -7381,11 +7381,6 @@
           }
         }
       }
-    },
-    "yarn": {
-      "version": "1.21.1",
-      "resolved": "https://registry.npmjs.org/yarn/-/yarn-1.21.1.tgz",
-      "integrity": "sha512-dQgmJv676X/NQczpbiDtc2hsE/pppGDJAzwlRiADMTvFzYbdxPj2WO4PcNyriSt2c4jsCMpt8UFRKHUozt21GQ=="
     }
   }
 }

package.json

@@ -47,8 +47,7 @@
     "winston": "^3.2.1",
     "winston-daily-rotate-file": "^4.3.1",
     "ws": "^7.2.0",
-    "yargs": "^15.0.2",
-    "yarn": "^1.21.1"
+    "yargs": "^15.0.2"
   },
   "pkg": {
     "scripts": [