Fix issue with mime type on login route. Update container instructions

docker-compose-prod.yml

@@ -0,0 +1,11 @@
+  slidgevoipms:
+    image: codeberg.org/boxedtoast/slidgevoipms:latest
+    container_name: slidgevoipms
+    restart: unless-stopped
+    networks:
+      - xmpp # should be the same one as your XMPP server
+    volumes:
+      - ./slidgevoipms.conf:/etc/slidge/conf.d/slidgevoipms.conf:ro
+      - ./slidgevoipmsattachments:/slidge-web # attachment directory
+      - ./slidgevoipmsdata:/var/lib/slidge:rw # slidge databases
+