Small docs site tweaks (#954)

* Add yarn.lock to .gitignore

* Tweak announcementBar message

* Add demo link to docs homepage

* chore(docs): logo-meaning page cleanup

* chore(docs): support page cleanup

* chore(docs): tech-stack page cleanup

* chore(docs): requirements page cleanup

* Update main README warning to match docs site

* Add clearer documentation link to main README

* chore(docs): one-step-install page cleanup

* chore(docs): Security: remove example JWT_SECRET value

* chore(docs): recommended-install page cleanup

* chore(docs): portainer-install page cleanup

* chore(docs): unraid-install page cleanup

docs/docusaurus.config.js

@@ -58,7 +58,7 @@ const config = {
     ({
       announcementBar: {
         id: "site_announcement_immich",
-        content: `⚠️ The project is under <strong>very active</strong> development. Expect bugs and changes. Do not use as a <strong>single source</strong> to store of your photos and videos!`,
+        content: `⚠️ The project is under <strong>very active</strong> development. Expect bugs and changes. Do not use it as <strong>the only way</strong> to store your photos and videos!`,
         backgroundColor: "#593f00",
         textColor: "#ffefc9",
         isCloseable: false,