Remove some platforms from docker build action

Signed-off-by: trivernis <trivernis@protonmail.com>

.github/workflows/docker.yml

@@ -29,7 +29,7 @@ jobs:
         with:
           context: .
           file: ./Dockerfile
-          platforms: linux/386,linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64,linux/ppc64le,linux/s390x
+          platforms: linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64
           push: true
           tags: |
             trivernis/snekcloud-server:latest