Unable to deploy changes to app migrated from Heroku

Hello

We migrated an app from Heroku using Turboku and while its been running perfectly, we are unable to deploy new changes to the running app. I took the config of the running app using the fly config save command and below is our config:

kill_signal = "SIGINT"
kill_timeout = 5

[build]
  builder = "heroku/buildpacks:18"

[env]
  APP_ENV = "production"
  PORT = "8080"

[experimental]
  allowed_public_ports = []
  auto_rollback = true
  cmd = []
  entrypoint = []
  exec = []

[processes]
  app = "cross-env node build/index.js"

[[services]]
  http_checks = []
  internal_port = 8080
  processes = ["app"]
  protocol = "tcp"
  script_checks = []
  [services.concurrency]
    hard_limit = 25
    soft_limit = 20
    type = "connections"

  [[services.ports]]
    force_https = true
    handlers = ["http"]
    port = 80

  [[services.ports]]
    handlers = ["tls", "http"]
    port = 443

  [[services.tcp_checks]]
    grace_period = "1s"
    interval = "15s"
    restart_limit = 0
    timeout = "2s"

As suggested in troubleshooting faq, I tried opening up port 8080 and in fact even hardcoded it to use that port in app but it didn’t help. This is an express app and is using heroku buildpack 18.

This is the error we are seeing

2022-09-02T19:33:14.802 runner[db2a8f29] iad [info] Starting instance

2022-09-02T19:33:35.971 runner[db2a8f29] iad [info] Configuring virtual machine

2022-09-02T19:33:35.978 runner[db2a8f29] iad [info] Pulling container image

2022-09-02T19:33:50.778 runner[db2a8f29] iad [info] Unpacking image

2022-09-02T19:33:51.112 app[03e272fa] iad [info] [2022-09-02 19:33:51] info: [HPM] Forwarding the GET request from http://www.getacquired.com:8080/api/feed.rss to https://api.getacquired.com/feed.rss

2022-09-02T19:33:51.174 app[03e272fa] iad [info] [2022-09-02 19:33:51] info: [HPM] Server responded with a 200

2022-09-02T19:33:51.178 app[03e272fa] iad [info] [2022-09-02 19:33:51] info: [Express] GET /api/feed.rss 200 - 64.134 ms

2022-09-02T19:33:51.178 app[03e272fa] iad [info]

2022-09-02T19:34:13.446 runner[db2a8f29] iad [info] Preparing kernel init

2022-09-02T19:34:13.879 runner[db2a8f29] iad [info] Configuring firecracker

2022-09-02T19:34:13.891 runner[db2a8f29] iad [info] Starting virtual machine

2022-09-02T19:34:14.178 app[db2a8f29] iad [info] Starting init (commit: 249766e)...

2022-09-02T19:34:14.211 app[db2a8f29] iad [info] Preparing to run: `launcher cross-env node build/index.js` as heroku

2022-09-02T19:34:14.246 app[db2a8f29] iad [info] 2022/09/02 19:34:14 listening on [fdaa:0:6e41:a7b:9d36:db2a:8f29:2]:22 (DNS: [fdaa::3]:53)

2022-09-02T19:34:15.221 app[db2a8f29] iad [info] Starting clean up.

2022-09-02T19:34:21.445 runner[db2a8f29] iad [info] Starting instance

2022-09-02T19:34:35.740 runner[db2a8f29] iad [info] Configuring virtual machine

2022-09-02T19:34:35.747 runner[db2a8f29] iad [info] Pulling container image

2022-09-02T19:34:37.372 runner[db2a8f29] iad [info] Unpacking image

2022-09-02T19:34:37.388 runner[db2a8f29] iad [info] Preparing kernel init

2022-09-02T19:34:37.884 runner[db2a8f29] iad [info] Configuring firecracker

2022-09-02T19:34:37.911 runner[db2a8f29] iad [info] Starting virtual machine

2022-09-02T19:34:38.117 app[db2a8f29] iad [info] Starting init (commit: 249766e)...

2022-09-02T19:34:38.155 app[db2a8f29] iad [info] Preparing to run: `launcher cross-env node build/index.js` as heroku

2022-09-02T19:34:38.187 app[db2a8f29] iad [info] 2022/09/02 19:34:38 listening on [fdaa:0:6e41:a7b:9d36:db2a:8f29:2]:22 (DNS: [fdaa::3]:53)

2022-09-02T19:34:39.163 app[db2a8f29] iad [info] Starting clean up.