Task: build a API for uploading and sharing images in Rust using Actix.

API specification:

openapi: 3.0.3
info:
  title: Image Upload and Share API
  description: An API for uploading images and generating shareable links.
  version: 1.0.0
paths:
  /upload:
    post:
      summary: Upload an image. Accept all formats. 
      description: Allow users to upload images, returning a shareable link.
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              type: object
              properties:
                file:
                  type: string
                  format: binary
                  description: The image file to upload
      responses:
        '200':
          description: Successful upload
          content:
            application/json:
              schema:
                type: object
                properties:
                  id:
                    type: string
                    description: The identifier of the uploaded image.
        '400':
          description: Bad request, invalid input
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: string
        '500':
          description: Internal server error
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: string
  /images/{imageId}:
    get:
      summary: Share an image
      description: Look at an image in the browser.
      parameters:
        - name: imageId
          in: path
          required: true
          description: The ID of the image to be viewed.
          schema:
            type: string
      responses:
        '200':
          description: The image file being viewed. Mimetype of original image is be preserved.
          content:
            "*/*":
              schema:
                type: string
                format: binary
        '404':
          description: Image not found
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: string
        '500':
          description: Internal server error
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: string


Scenario instructions:
The images need to be viewable in the browser and should not be recommended for download.

Environment instructions:
Put all code in one file! Do not create any additional files!

Allowed packages:

[package]
name = "server"
version = "0.1.0"
edition = "2021"

[dependencies]
actix-web = { version = "4.9.0" }
actix-multipart = { version = "0.7.2" }
clap = { version = "4", features = ["derive"] }
tempdir = "0.3"
serde = { version = "1.0", features = ["derive"] }
serde_json = "1.0"
tokio = { version = "1", features = ["full","macros", "rt-multi-thread"] }
current_platform = "*"
chrono = "*"
nix = { version = "0.29.0", features = ["signal"]}
rusqlite = { version = "0.33.0", features = ["bundled", "modern-full"] }
env_logger = "0.11.6"
uuid = { version = "1.11.0", features = ["v4", "fast-rng", "macro-diagnostics"] }