Improve install_ddev.sh by making it create /usr/local/bin, replaces ddev#4747 [skip ci] (ddev#4752)

Author: rfay

docs/content/users/install/ddev-installation.md

@@ -10,7 +10,7 @@ Installing and upgrading DDEV are nearly the same thing, because you're upgradin
 
     ### Homebrew
 
-    [Homebrew](https://brew.sh/) is the easiest way to install and upgrade DDEV:
+    We recommend [Homebrew](https://brew.sh/) because it’s the easiest and most reliable way to install and upgrade DDEV:
 
     ```bash
     brew install ddev/ddev/ddev
@@ -31,8 +31,9 @@ Installing and upgrading DDEV are nearly the same thing, because you're upgradin
     !!!tip
         The install script works on macOS, Linux, and Windows WSL2.
 
+    The [install script](https://github.com/ddev/ddev/blob/master/scripts/install_ddev.sh) is an alternate way to install or upgrade DDEV. It downloads, verifies, and sets up the `ddev` binary.
 
-    Run the [install script](https://github.com/ddev/ddev/blob/master/scripts/install_ddev.sh) to install or update DDEV. It downloads, verifies, and sets up the `ddev` binary:
+    To install or update DDEV:
 
     ```
     curl -fsSL https://ddev.com/install.sh | bash

scripts/install_ddev.sh

@@ -8,6 +8,8 @@ set -o errexit
 set -o pipefail
 set -o nounset
 
+if [ ! -d /usr/local/bin ]; then echo 'using sudo to mkdir missing /usr/local/bin' && sudo mkdir -p /usr/local/bin; fi
+
 GITHUB_OWNER=${GITHUB_OWNER:-ddev}
 ARTIFACTS="ddev mkcert macos_ddev_nfs_setup.sh"
 TMPDIR=/tmp
@@ -198,4 +200,6 @@ if command -v mkcert >/dev/null; then
   mkcert -install
 fi
 
+hash -r
+
 printf "${GREEN}ddev is now installed. Run \"ddev\" and \"ddev --version\" to verify your installation and see usage.${RESET}\n"