feat: use web-entrypoint.d script

This is to match current approach of ddev to installing n, as it happens
on the start.sh script

.ddev/addon-metadata/readme/manifest.yaml

@@ -1,7 +1,7 @@
 name: readme
 repository: .
 version: ""
-install_date: "2024-06-10T14:45:21-03:00"
+install_date: "2024-08-21T12:14:13-03:00"
 project_files:
     - web-build/Dockerfile.readme
     - readme/.gitignore
@@ -10,7 +10,7 @@ project_files:
     - readme/build.sh
     - readme/whichnode.sh
     - readme/.ahoy.readme.yml
-    - web-build/Dockerfile.readme
+    - web-entrypoint.d/readme-nodedeps.sh
     - config.readme.yaml
 global_files: []
 removal_actions: []

.ddev/web-entrypoint.d/readme-nodedeps.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+#ddev-generated
+
+# We install it as a web-entrypoint.d shell because that's after n installs the
+# configured version
+
+version=$(node -v | awk -F'[v.]' '{print $2}'); \
+if [ $version -lt 18 ]; then \
+  n install lts -d; \
+  n exec lts npm install -g markdown-toc prettier; \
+else \
+  npm install -g markdown-toc prettier; \
+fi

install.yaml

@@ -7,7 +7,7 @@ project_files:
   - readme/build.sh
   - readme/whichnode.sh
   - readme/.ahoy.readme.yml
-  - web-build/Dockerfile.readme
+  - web-entrypoint.d/readme-nodedeps.sh
   - config.readme.yaml
 post_install_actions:
   - |
@@ -20,3 +20,13 @@ post_install_actions:
         echo "Existing "$file" does not have #ddev-generated, so can't be renamed"
       fi
     fi
+  - |
+    #ddev-description: [update] Remove Dockerfile
+    file="web-build/Dockerfile.readme"
+    if [ -f "$file" ]; then
+      if grep '#ddev-generated' "$file" > /dev/null 2>&1; then
+        rm $file
+      else
+        echo "Existing "$file" does not have #ddev-generated, so can't be removed"
+      fi
+    fi

web-entrypoint.d/readme-nodedeps.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+#ddev-generated
+
+# We install it as a web-entrypoint.d shell because that's after n installs the
+# configured version
+
+version=$(node -v | awk -F'[v.]' '{print $2}'); \
+if [ $version -lt 18 ]; then \
+  n install lts -d; \
+  n exec lts npm install -g markdown-toc prettier; \
+else \
+  npm install -g markdown-toc prettier; \
+fi