Tests

[nksaraf]

• replace passthrough with fallthrough #84 passthrough for public assets (dev & prod)
• fix: server preset defined in app config not working #78 check all variations of preset being passed and the precedence rules related to that (just need to check build setup probably)
• CSS Not in Initial Document for Prod Builds (Waterfalls) #79 test css/asset loading extensively across setups (this is kindof testing the Manifest)
• [Bug?]: Router "base" property is flaky solidjs/solid-start#1158 #55 baseURL server
• [Bug?]: Cannot use vite proxy with 0.4.x solidjs/solid-start#1180 #47 devProxy