Why my bash command is not found

snapcraft
3

I used electron-builder to package this. I am not sure if this is right file you are looking for but I did see this snapcraft.yaml file in a temporary folder created during the build process

base: core18
grade: stable
confinement: devmode
parts:
  launch-scripts:
    plugin: dump
    source: scripts
  gnome-platform-empty-dirs:
    plugin: nil
    override-build: |
      mkdir -p "$SNAPCRAFT_PART_INSTALL/data-dir/themes" mkdir -p "$SNAPCRAFT_PART_INSTALL/data-dir/icons" mkdir -p "$SNAPCRAFT_PART_INSTALL/data-dir/sounds" mkdir $SNAPCRAFT_PART_INSTALL/gnome-platform
  app-files:
    plugin: dump
    source: app
    organize:
      '*': app/
    stage:
      - '-app/chrome-sandbox'
      - '-LICENSES.chromium.html'
  app:
    plugin: nil
    stage:
      - '-usr/lib/python*'
      - '-usr/bin/python*'
      - '-var/lib/ucf'
      - '-usr/include'
      - '-usr/lib/X11'
      - '-usr/share'
      - '-usr/sbin'
      - '-usr/bin'
      - '-usr/lib/*/libicudata.*'
      - '-usr/lib/*/libicui18n.*'
      - '-usr/lib/*/libgtk-*'
      - '-usr/lib/*/libgdk-*'
      - '-usr/lib/*/glib-*'
      - '-usr/lib/*/gtk-*'
      - '-usr/lib/*/gdk-*'
      - '-usr/lib/*/krb5'
      - '-usr/lib/systemd'
      - '-usr/lib/glib-networking'
      - '-usr/lib/dconf'
      - '-usr/lib/*/avahi'
      - '-usr/lib/*/gio'
      - '-usr/lib/*/libatk*'
      - '-usr/lib/*/libatspi*'
      - '-usr/lib/*/libavahi*'
      - '-usr/lib/*/libcairo*'
      - '-usr/lib/*/libcolordprivate*'
      - '-usr/lib/*/libcolord*'
      - '-usr/lib/*/libcroco*'
      - '-usr/lib/*/libcups*'
      - '-usr/lib/*/libdatrie*'
      - '-usr/lib/*/libdconf*'
      - '-usr/lib/*/libepoxy*'
      - '-usr/lib/*/libexpatw*'
      - '-usr/lib/*/libffi*'
      - '-usr/lib/*/libfontconfig*'
      - '-usr/lib/*/libfreetype*'
      - '-usr/lib/*/libgdk_pixbuf*'
      - '-usr/lib/*/libgdk_pixbuf_xlib*'
      - '-usr/lib/*/libgio*'
      - '-usr/lib/*/libglib*'
      - '-usr/lib/*/libgmodule*'
      - '-usr/lib/*/libgmp*'
      - '-usr/lib/*/libgnutls*'
      - '-usr/lib/*/libgobject*'
      - '-usr/lib/*/libgraphite2*'
      - '-usr/lib/*/libgssapi_krb5*'
      - '-usr/lib/*/libgthread*'
      - '-usr/lib/*/libharfbuzz*'
      - '-usr/lib/*/libhogweed*'
      - '-usr/lib/*/libicuio*'
      - '-usr/lib/*/libicutest*'
      - '-usr/lib/*/libicutu*'
      - '-usr/lib/*/libicuuc*'
      - '-usr/lib/*/libidn2*'
      - '-usr/lib/*/libjbig*'
      - '-usr/lib/*/libjpeg*'
      - '-usr/lib/*/libjson*'
      - '-usr/lib/*/libk5crypto*'
      - '-usr/lib/*/libkrb5*'
      - '-usr/lib/*/libkrb5support*'
      - '-usr/lib/*/liblcms2*'
      - '-usr/lib/*/libnettle*'
      - '-usr/lib/*/libp11*'
      - '-usr/lib/*/libpango*'
      - '-usr/lib/*/libpangocairo*'
      - '-usr/lib/*/libpangoft2*'
      - '-usr/lib/*/libpixman*'
      - '-usr/lib/*/libpng16*'
      - '-usr/lib/*/libproxy*'
      - '-usr/lib/*/librest*'
      - '-usr/lib/*/librsvg*'
      - '-usr/lib/*/libsecret*'
      - '-usr/lib/*/libsoup*'
      - '-usr/lib/*/libsqlite3*'
      - '-usr/lib/*/libtasn1*'
      - '-usr/lib/*/libthai*'
      - '-usr/lib/*/libtiff*'
      - '-usr/lib/*/libunistring*'
      - '-usr/lib/*/libwayland*'
      - '-usr/lib/*/libX11*'
      - '-usr/lib/*/libXau*'
      - '-usr/lib/*/libxcb.so*'
      - '-usr/lib/*/libxcb-dri2*'
      - '-usr/lib/*/libxcb-dri3*'
      - '-usr/lib/*/libxcb-glx*'
      - '-usr/lib/*/libxcb-present*'
      - '-usr/lib/*/libxcb-render*'
      - '-usr/lib/*/libxcb-shm*'
      - '-usr/lib/*/libxcb-sync*'
      - '-usr/lib/*/libxcb-xfixes*'
      - '-usr/lib/*/libXcomposite*'
      - '-usr/lib/*/libXcursor*'
      - '-usr/lib/*/libXdamage*'
      - '-usr/lib/*/libXdmcp*'
      - '-usr/lib/*/libXext*'
      - '-usr/lib/*/libXfixes*'
      - '-usr/lib/*/libXinerama*'
      - '-usr/lib/*/libXi*'
      - '-usr/lib/*/libxkbcommon*'
      - '-usr/lib/*/libxml2*'
      - '-usr/lib/*/libXrandr*'
      - '-usr/lib/*/libXrender*'
    stage-packages:
      - x11-utils
      - libnspr4
      - libnss3
      - libxss1
      - libappindicator3-1
      - libsecret-1-0
plugs:
  gnome-3-28-1804:
    interface: content
    target: $SNAP/gnome-platform
    default-provider: gnome-3-28-1804
  gtk-3-themes:
    interface: content
    target: $SNAP/data-dir/themes
    default-provider: gtk-common-themes
  icon-themes:
    interface: content
    target: $SNAP/data-dir/icons
    default-provider: gtk-common-themes
  sound-themes:
    interface: content
    target: $SNAP/data-dir/sounds
    default-provider: gtk-common-themes
name: mysnap
version: 1.0.0-beta
title: My Snap
summary: My snap app
description: My little snap app
architectures:
  - amd64
apps:
  mysnap:
    command: command.sh
    plugs:
      - desktop
      - desktop-legacy
      - home
      - x11
      - wayland
      - unity7
      - browser-support
      - network
      - gsettings
      - audio-playback
      - pulseaudio
      - opengl
    adapter: none
    autostart: mysnap.desktop
    environment:
      DISABLE_WAYLAND: '1'
      PATH: $SNAP/usr/sbin:$SNAP/usr/bin:$SNAP/sbin:$SNAP/bin:$PATH
      SNAP_DESKTOP_RUNTIME: $SNAP/gnome-platform
      LD_LIBRARY_PATH: $SNAP_LIBRARY_PATH:$SNAP/lib:$SNAP/usr/lib:$SNAP/lib/x86_64-linux-gnu:$SNAP/usr/lib/x86_64-linux-gnu:$LD_LIBRARY_PATH:$SNAP/lib:$SNAP/usr/lib:$SNAP/lib/x86_64-linux-gnu:$SNAP/usr/lib/x86_64-linux-gnu
icon: snap/gui/icon.png