File suffix support for CF_API_KEY (#3489)

docs/mods-and-plugins/curseforge-files.md

@@ -6,7 +6,7 @@ A specific file can be omitted from each reference to allow for auto-selecting t
 
 !!! warning "CurseForge API key usage"
 
-    A CurseForge API key must be allocated and set with `CF_API_KEY` [as described here](../types-and-platforms/mod-platforms/auto-curseforge.md#api-key).
+    A CurseForge API key must be allocated and set with `CF_API_KEY` (or `CF_API_KEY_FILE`) [as described here](../types-and-platforms/mod-platforms/auto-curseforge.md#api-key).
 
 ## Project-file references
 

docs/types-and-platforms/mod-platforms/auto-curseforge.md

@@ -32,6 +32,20 @@ To manage a CurseForge modpack automatically with upgrade support, pinned or lat
     docker run --env-file=.env itzg/minecraft-server
     ```
 
+    Alternately you can use [docker secrets](https://docs.docker.com/compose/how-tos/use-secrets/) with a `CF_API_KEY_FILE` environment variable:
+    ```
+    service:
+      environment:
+        CF_API_KEY_FILE: /run/secrets/cf_api_key
+      secrets:
+        - cf_api_key
+
+    secrets:
+      cf_api_key:
+        file: cf_api_key.secret
+    ```
+
+
 !!! note
     Be sure to use the appropriate [image tag for the Java version compatible with the modpack](../../versions/java.md).
     

docs/variables.md

@@ -730,6 +730,12 @@ alternatively, you can mount: <code>/etc/localtime:/etc/localtime:ro
             <td><code></code></td>
             <td>✅</td>
         </tr>
+        <tr>
+            <td><code>CF_API_KEY_FILE</code></td>
+            <td>A path to a file inside of container that contains <strong>YOUR</strong> CurseForge (Eternal) API Key.</td>
+            <td><code></code></td>
+            <td>✅</td>
+        </tr>        
         <tr>
             <td><code>CF_PAGE_URL</code></td>
             <td>Pass a page URL to the modpack or a specific file</td>