Fix build & compile skia from source

Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:20.04
+FROM python
 
 #Required for tzdata
 ENV TZ=Europe/Amsterdam
@@ -9,12 +9,13 @@ RUN apt-get update
 RUN apt-get upgrade -y
 RUN apt-get install -y git unzip curl build-essential cmake ninja-build libx11-dev libxcursor-dev libxi-dev libgl1-mesa-dev libfontconfig1-dev
 
+COPY compile.sh /
+
 VOLUME /dependencies
 VOLUME /output
 
 WORKDIR /output
 
-COPY compile.sh /
-
 RUN ["chmod", "+x", "/compile.sh"]
-ENTRYPOINT ["/compile.sh"]
+
+ENTRYPOINT ["/compile.sh"]