feat(env): add example env file and update .gitignore to include it

.env.example

@@ -0,0 +1,11 @@
+DATABASE_URL=
+
+AUTH_SECRET= # Added by `npx auth`. Read more: https://cli.authjs.dev
+
+AUTH_AUTHENTIK_ID=
+AUTH_AUTHENTIK_SECRET=
+AUTH_AUTHENTIK_ISSUER=
+
+NEXT_PUBLIC_APP_URL=
+
+MEETUP_SKIP_LOGIN=

.gitignore

@@ -32,6 +32,7 @@ yarn-error.log*
 
 # env files (can opt-in for committing if needed)
 .env*
+!.env.example
 
 # vercel
 .vercel