fix docker makefile; broke from bitrot since nobody's using it

(the podman approach (make.sh) is recommended)

scripts/docker/Makefile

@@ -6,7 +6,12 @@ all:
 	
 	rm -rf i
 	mkdir i
-	tar -cC../.. dist/copyparty-sfx.py bin/mtag | tar -xvCi
+	tar -cC../../dist    copyparty-sfx.py          | tar -xvCi
+	tar -cC../..         bin/mtag                  | tar -xvCi
+    
+#   # use stock ffmpeg because ./base/Makefile requires podman;
+#   # beware: https://github.com/9001/copyparty/blob/hovudstraum/docs/bad-codecs.md
+	touch i/stock_ffmpeg
 	
 	docker build -t copyparty/min:latest -f Dockerfile.min .
 	echo 'scale=1;'`docker save copyparty/min:latest | pigz -c | wc -c`/1024/1024 | bc

scripts/docker/innvikler.sh

@@ -14,8 +14,11 @@ ised() {
 	tmv "$2"
 }
 
+# use stock ffmpeg if requested
+echo $1 | grep -qE 'ac|iv|dj' && [ -e "/z/stock_ffmpeg" ] && apk add ffmpeg
+
 # use custom ffmpeg if relevant
-echo $1 | grep -qE 'ac|iv|dj' && (
+echo $1 | grep -qE 'ac|iv|dj' && [ ! -e "/z/stock_ffmpeg" ] && (
   cp -pv /z/packages/*.pub /etc/apk/keys/
   cd /z/packages/$(cat /etc/apk/arch)
   apk add ./ffmpeg-*.apk