syntax and readme updates

Dockerfile

@@ -1,3 +1,5 @@
+# syntax=docker/dockerfile:1
+
 FROM ghcr.io/linuxserver/baseimage-selkies:ubuntunoble
 
 # set version label

Dockerfile.aarch64

@@ -1,3 +1,5 @@
+# syntax=docker/dockerfile:1
+
 FROM ghcr.io/linuxserver/baseimage-selkies:arm64v8-ubuntunoble
 
 # set version label

README.md

@@ -222,8 +222,6 @@ services:
   mame:
     image: lscr.io/linuxserver/mame:latest
     container_name: mame
-    security_opt:
-      - seccomp:unconfined #optional
     environment:
       - PUID=1000
       - PGID=1000
@@ -243,7 +241,6 @@ services:
 ```bash
 docker run -d \
   --name=mame \
-  --security-opt seccomp=unconfined `#optional` \
   -e PUID=1000 \
   -e PGID=1000 \
   -e TZ=Etc/UTC \
@@ -270,7 +267,6 @@ Containers are configured using parameters passed at runtime (such as those abov
 | `-v /config` | Users home directory in the container, stores local files and settings |
 | `-v /mame:ro` | MAME directory containing artwork, roms, and assets. |
 | `--shm-size=` | This is needed for MAME to function. |
-| `--security-opt seccomp=unconfined` | For Docker Engine only, many modern gui apps need this to function on older hosts as syscalls are unknown to Docker. |
 
 ## Environment variables from files (Docker secrets)
 

readme-vars.yml

@@ -17,9 +17,6 @@ development_versions: false
 # container parameters
 common_param_env_vars_enabled: true
 param_container_name: "{{ project_name }}"
-param_usage_include_env: true
-param_env_vars:
-  - {env_var: "TZ", env_value: "Europe/London", desc: "Specify a timezone to use EG Europe/London."}
 param_usage_include_vols: true
 param_volumes:
   - {vol_path: "/config", vol_host_path: "/path/to/config", desc: "Users home directory in the container, stores local files and settings"}
@@ -30,10 +27,6 @@ param_ports:
   - {external_port: "3001", internal_port: "3001", port_desc: "HTTPS MAME desktop gui."}
 custom_params:
   - {name: "shm-size", name_compose: "shm_size", value: "1gb", desc: "This is needed for MAME to function."}
-# optional variables
-opt_security_opt_param: true
-opt_security_opt_param_vars:
-  - {run_var: "seccomp=unconfined", compose_var: "seccomp:unconfined", desc: "For Docker Engine only, many modern gui apps need this to function on older hosts as syscalls are unknown to Docker."}
 # Selkies blurb settings
 selkies_blurb: true
 show_nvidia: true