feat: add api to retrive files from .cache (#7)

- add api to request files from cache
- remove start command required to start server, simply executing the file will work
- gmail: bundle files from gmail thread into zip
- fix relative path detection for providers

Author: gamemaker1

README.md

@@ -18,30 +18,19 @@ The installation can be done manually on Linux, MacOS, Android (Requires Termux)
 
 - First, download the proper executable for your platform from the [Releases page](https://github.com/gamemaker1/dabbu-server/releases). (Caution: releases may not work on certain versions of Android, depending on the manafacturer and version.)
 
-- Open terminal/command prompt and run the following command:
+- On Windows, simply double click on the file to run it. 
 
-  ```sh
-  $ /path/to/executable start
-  ```
-
-  If I have downloaded the executable to my downloads folder, the command would be:
-
-  - On Windows:
-    
-    ```bat
-    $ C:\Users\<user name>\Downloads\dabbu-server-win.exe start
-    ```
-    
+- On Linux/MacOS, run the following command in a terminal (assuming you have downloaded the executable to your Downloads folder):
   - On MacOS:
-    
+
     ```sh
-    $ ~/Downloads/dabbu-server-macos start
+    $ ~/Downloads/dabbu-server-macos
     ```
-    
+
   - On Linux:
-    
+  
     ```sh
-    $ ~/Downloads/dabbu-server-linux start
+    $ ~/Downloads/dabbu-server-linux
     ```
 
 - Your server is now running! To check, go to http://localhost:8080/. You will see the text `Dabbu Server running on port 8080` on the page. If not, try running the server again or check if you have missed a step. If the problem persists, post a message on [Github discussions](https://github.com/gamemaker1/dabbu-server/discussions/categories/q-a) asking for help. We'll only be glad to help you :)

docs/APIs.md

@@ -86,7 +86,7 @@ Please URL encode all params, especially file and folder paths while sending req
   - `fileName`: Name of the file - `string`
 - Request body: [Posted as multipart form data]
   - The request body may contain any fields that the provider requires to execute the request
-  - `content`: The file content - `file-data` [Compulsory]
+  - `content`: The file content - `file-data` [Optional]
   - `name`: The name of the file - `string` [Optional]
   - `path`: The path to the folder in which the file resides - `string` [Optional]
   - `createdAtTime`: Time the file was created (may not be supported by all providers) - `timestamp` [Optional]
@@ -112,3 +112,15 @@ Please URL encode all params, especially file and folder paths while sending req
   - `404`: The file was not found - `notFound`
   - `500`: Internal server error, used if an uncaught exception appears - `internalServerError`
   - `503`: Provider not available - `providerNotFound`
+
+### **Download a file from cache**
+#### **GET**: `/cache/:filePath`
+- Request parameters: [Compulsory]
+  - `filePath`: Path to the file - `string`
+- Request body: [Empty]
+- Response:
+  - `res`: Download of the file's contents
+- Errors:
+  - `400`: The file path was incorrect - `malformedUrl`
+  - `404`: The file was not found - `notFound`
+  - `500`: Internal server error, used if an uncaught exception appears - `internalServerError`