feat: upload module (#486)

* feat: wip upload module

* feat: local storage and serve local images

* feat: protect against injections

* feat: server local and s3 files

* fix: use storage location when serving local files

* feat: cross field env validation

server/src/utils/image.ts

@@ -0,0 +1,21 @@
+const cropRegex = /([w|h])([0-9]+)/;
+
+export type ShortCropSize = `${'w' | 'h'}${number}` | 'original';
+
+export interface CropSize {
+  type: 'width' | 'height';
+  value: number;
+}
+
+export const getCropSize = (value: ShortCropSize): CropSize | null => {
+  const match = value.match(cropRegex);
+
+  if (value === 'original' || match === null) {
+    return null;
+  }
+
+  return {
+    type: match[1] === 'w' ? 'width' : 'height',
+    value: +match[2],
+  };
+};