Expressjs app started with PM2 in Docker dies with SIGINT

I have a VERY SIMPLE Expressjs app - basically a library wrapper with the single post call.

Here is the app.js conents:

var compression = require('compression');
var express = require('express');
var path = require('path');
var bodyParser = require('body-parser');

var convert = require('./routes/convert');

var app = express();

app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(compression());

app.use('/', convert);

module.exports = app;

Then I created Dockerfile to containerize the app:

FROM mhart/alpine-node
WORKDIR /src

COPY package.json ./
COPY app.js ./
ADD routes/ ./routes/
ADD bin/ ./bin/

RUN npm i
RUN npm install -g pm2@2.4.0

EXPOSE 3000
CMD ["pm2-docker", "app.js"]

And here is what happens when I try to bring it up (this is with the DEBUG=express:*)

[STREAMING] Now streaming realtime logs for [all] processes
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:router:route new /
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:router:layer new /
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:router:route post /
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:router:layer new /
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:application set "x-powered-by" to true
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:application set "etag" to 'weak'
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:application set "etag fn" to [Function: wetag]
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:application set "env" to 'development'
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:application set "query parser" to 'extended'
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:application set "query parser fn" to [Function: parseExtendedQueryString]
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:application set "subdomain offset" to 2
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:application set "trust proxy" to false
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:application set "trust proxy fn" to [Function: trustNone]
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:application booting in development mode
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:application set "view" to [Function: View]
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:application set "views" to '/src/views'
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:application set "jsonp callback name" to 'callback'
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:router use / query
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:router:layer new /
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:router use / expressInit
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:router:layer new /
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:router use / jsonParser
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:router:layer new /
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:router use / urlencodedParser
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:router:layer new /
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:router use / compression
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:router:layer new /
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:router use / router
2017-05-14-04:15:09 0|app      | Sun, 14 May 2017 04:15:09 GMT express:router:layer new /
2017-05-14-04:15:09 PM2        | App [app] with id [0] and pid [89], exited with code [0] via signal [SIGINT]
2017-05-14-04:15:09 PM2        | Starting execution sequence in -fork mode- for app name:app id:0
2017-05-14-04:15:09 PM2        | App name:app id:0 online

looks like that process dies and being restarted then all the time. I'm not a Node developer just need this one get working and looking forward to any suggestions and help.

Thanks.

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