Installer CLI fix (#6049)

* Update heroku procfile

- Fix command to run on ubuntu 20.04
- Add "invoke" command (duplicate of "cli")

* Update docs for installer

* Fix typo

* Update root_commands.sh

Procfile

@@ -1,3 +1,8 @@
+# Web process: gunicorn
 web: env/bin/gunicorn --chdir $APP_HOME/InvenTree -c InvenTree/gunicorn.conf.py InvenTree.wsgi -b 0.0.0.0:$PORT
+# Worker process: qcluster
 worker: env/bin/python InvenTree/manage.py qcluster
-cli: echo "" && . env/bin/activate && exec env/bin/python -m invoke
+# Invoke commands
+invoke: echo "" | echo "" && . env/bin/activate && invoke
+# CLI: Provided for backwards compatibility
+cli: echo "" | echo "" && . env/bin/activate && invoke

contrib/install.sh

@@ -111,7 +111,7 @@ root_command() {
   done
 
   if [[ $NEEDS_LIBSSL1_1 == "true" ]]; then
-      echo "### Pathching for libssl1.1"
+      echo "### Installing libssl1.1"
 
       echo "deb http://security.ubuntu.com/ubuntu focal-security main" | sudo tee /etc/apt/sources.list.d/focal-security.list
       do_call "sudo apt-get update"

contrib/installer/src/root_command.sh

@@ -101,7 +101,7 @@ for pkg in $REQS; do
 done
 
 if [[ $NEEDS_LIBSSL1_1 == "true" ]]; then
-    echo "### Pathching for libssl1.1"
+    echo "### Installing libssl1.1"
 
     echo "deb http://security.ubuntu.com/ubuntu focal-security main" | sudo tee /etc/apt/sources.list.d/focal-security.list
     do_call "sudo apt-get update"

docs/docs/start/installer.md

@@ -151,6 +151,20 @@ inventree config
     All CLI settings are lost when the package is uninstalled.
     Use the config file where possible as it is kept on uninstall and can easily be synced across instances. Environment variables are a good place for passwords (but not the secret_key).
 
+### Invoke
+
+Many InvenTree administration operations run using the `invoke` tool. When installed via the package installer, these commands can be called as follows:
+
+```bash
+inventree run invoke <command>
+```
+
+For example, to print InvenTree version information:
+
+```bash
+inventree run invoke version
+```
+
 ## Architecture
 
 The packages are provided by [packager.io](https://packager.io/). They are built each time updates are pushed to GitHub and released about 10 minutes later. The local package index must be updated to see the new release in the package manager.