docs: add deploy URL and base HREF comparison

Author: clydin

docs/design/deployurl-basehref.md

@@ -0,0 +1,18 @@
+| | Deploy URL | Base HREF |
+|--|:--:|:--:|
+| Initial scripts (index.html) | ✅ 👍 | ✅ 👍  |
+| Initial stylesheets (index.html) | ✅ 👍  | ✅ 👍  |
+| Lazy scripts (routes/import()/etc.) | ✅ 👍  | ✅ 👍  |
+| Processed CSS resources (images/fonts/etc.) | ✅ 👍  | ✅ 👍 |
+| Relative template (HTML) assets | ❌ 👎 | ✅ 👍  |
+| Angular Router Default Base (APP_BASE_HREF) | ❌ | ✅ *1 |
+| Single reference in deployed Application | ❌ 👎  | ✅ 👍 |
+| Special resource logic within CLI | ✅ 👎 | ❌ 👍 |
+| Relative fetch/XMLHttpRequest | ❌ | ✅ |
+
+✅ - has/affects the item/trait
+❌ - does not have/affect the item/trait
+👍 - favorable behavior
+👎 - unfavorable behavior
+
+*1 -- Users with more complicated setups may need to manually configure the `APP_BASE_HREF` token within the application.  (e.g., application routing base is `/` but assets/scripts/etc. are at `/assets/`)