Make some sane defaults

LinuxGeneralCompiler/Dockerfile

@@ -2,7 +2,7 @@ FROM git.zontreck.com/packages/appimage:latest
 
 ENV PUB NAN
 ENV AGENT NAN
-ENV VSAPI 1
+ENV VSAPI 1.20.12
 LABEL VINTAGESTORY API is available
 
 WORKDIR /

LinuxGeneralCompiler/mkdotgame

@@ -1,7 +1,12 @@
 #!/bin/bash
 # 
+VERSION=$VSAPI  # predetermined version
 
-local version=$1
+if [ -z "$1" ]; then
+    local version=$VERSION
+else
+    local version=$1
+fi
 
 rm .game || true
 dlvs $version || true