Refactor data handlers + misc fixes

This refactors the data handlers into a more standard/understood model-like architecture, to prepare for a new, more robust config system.

It also fixes a problem with creating new Notes and uploading new Photos via the web interface (related to #58).

Finally, it speeds up docker builds by sending in less files, which aren't necessary or will be built anyway.

This is all in preparation to allow building #13 more robustly.

routes/photos/thumbnail/[fileName].tsx

@@ -2,7 +2,7 @@ import { Handlers } from 'fresh/server.ts';
 import { resize } from 'https://deno.land/x/deno_image@0.0.4/mod.ts';
 
 import { FreshContextState } from '/lib/types.ts';
-import { getFile } from '/lib/data/files.ts';
+import { FileModel } from '/lib/models/files.ts';
 
 interface Data {}
 
@@ -37,7 +37,7 @@ export const handler: Handlers<Data, FreshContextState> = {
       currentPath = `${currentPath}/`;
     }
 
-    const fileResult = await getFile(context.state.user.id, currentPath, decodeURIComponent(fileName));
+    const fileResult = await FileModel.get(context.state.user.id, currentPath, decodeURIComponent(fileName));
 
     if (!fileResult.success) {
       return new Response('Not Found', { status: 404 });