Hello

I’ve got a weird websocket error when I deploy my app using edeliver:

WebSocket connection to 'ws://staging.cur-vita.com/socket/websocket?token=undefined&vsn=2.0.0' failed: Error during WebSocket handshake: net::ERR_CONNECTION_RESET

I do not know what went wrong, everything is working fine locally (both dev and prod env).
Did anybody had a similar error?

My prod config:

config :curvita, CurvitaWeb.Endpoint,
  http: [port: 4000],
  url: [host: "localhost", port: 80],
  check_origin: true,
  cache_static_manifest: "priv/static/cache_manifest.json",
  server: true,
  root: ".",
  version: Mix.Project.config[:version]

# Do not print debug messages in production
config :logger, level: :info
config :curvita, :environment, :prod

my edeliver config is:

APP="curvita"

BUILD_HOST="staging.cur-vita.com"
BUILD_USER="deploy"
BUILD_AT="/tmp/edeliver/$APP/builds"

RELEASE_DIR="/tmp/edeliver/$APP/builds/_build/prod/rel/$APP"

# prevent re-installing node modules; this defaults to "."
GIT_CLEAN_PATHS="_build rel priv/static"

# STAGING_HOSTS="188.166.182.170"
# STAGING_USER="deploy"
# TEST_AT="/home/deploy/staging"

PRODUCTION_HOSTS="staging.cur-vita.com"
PRODUCTION_USER="deploy"
DELIVER_TO="/home/deploy"

# For *phx* projects, symlink prod.secret.exs to our tmp source
pre_erlang_get_and_update_deps() {
  local _prod_secret_path="/home/deploy/prod.secret.exs"
  if [ "$TARGET_MIX_ENV" = "prod" ]; then
    __sync_remote "
      ln -sfn '$_prod_secret_path' '$BUILD_AT/config/prod.secret.exs'
    "
  fi
}

pre_erlang_clean_compile() {
  status "Running phx.digest" # log output prepended with "----->"
  __sync_remote " # runs the commands on the build host
    # [ -f ~/.profile ] && source ~/.profile # load profile (optional)
    source ~/.profile
    
    # echo \$PATH # check if rbenv is in the path
    set -e # fail if any command fails (recommended)
    cd '$BUILD_AT' # enter the build directory on the build host (required)

    # prepare something
    mkdir -p priv/static # required by the phx.digest task
    cd ./assets

    npm install 

    ./node_modules/.bin/webpack -p

    cd ../

    # run your custom task
    APP='$APP' MIX_ENV='$TARGET_MIX_ENV' $MIX_CMD phx.digest $SILENCE
  "
}

Cheers