Update README.md

README.md

@@ -1 +1,83 @@
 # storage-upload
+
+Docker micro service for uploading files to a storage server.
+
+# Usage
+
+storage-upload listens on port 4020 by default. Since the storage upload needs a place to store the uploaded files, it's important to map the `/app/public` folder to either locally or some volume.
+
+In addition it's recommended to also map the config file `/app/config/config.production.json` which should include a list of accepted sites and the corresponding json web token secret.
+
+```bash
+docker run -d \
+  --name storage-upload \
+  -v /path/to/store/files:/app/public \
+  -v /path/to/config/file.json:/app/config/config.production.json \
+  -p 4000:4020
+  nfpis/storage-upload
+```
+
+### Config
+
+The config file should look something like this:
+
+`config.production.json`
+```json
+{
+  "sites": {
+    "site1": "site1-secret",
+    "site2": "site2-secret"
+  }
+}
+```
+
+The server checks the token in the query for supported site name and then verifies the secret match. To generate a token valid to upload to `site2` above, you can run something like this:
+
+```node
+const jwt = require('jsonwebtoken')
+
+let token = jwt.sign({ site: 'site2' }, 'site2-secret')
+// eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzaXRlIjoic2l0ZTIifQ.Ovz7fnTMzaWOLOhnbkMtqHPk20EVqhCD8WDsLKk_Wv0
+```
+
+*Hint: Post the above token to https://jwt.io/ and check it out.*
+
+Using the above token would save the requested file under `/app/public/site2/` folder
+
+# API
+
+## Media
+
+Uploading or removing uploaded files on the storage server.
+
+* **URL**
+
+  /media
+
+* **Method:**
+  
+  `POST`
+  
+*  **URL Params**
+ 
+   `token=[json-web-token]`
+
+* **Data Params**
+   
+   `file=@my-file-to-upload.jpg`
+
+* **Success Response:**
+
+  * **Code:** 200 <br />
+    **Content:** `{ filename: '20171210_115632_my-file-to-upload.jpg', path: '/development/20171210_115632_my-file-to-upload.jpg' }`
+ 
+* **Error Response:**
+
+  * **Code:** 422 UNPROCESSABLE ENTRY <br />
+    **Content:** `{ status:422, message: "error message here" }`
+
+* **Sample Call:**
+
+  ```bash
+  curl -X POST -F "file=@test.png" http://localhost:4000/media\?token\=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzaXRlIjoidGVzdCJ9.2LAuYwb1bwiMPUWD3gNJKwt9PwLgctleLhYd6sc0FCU
+  ```