Delete Ubuntu dockerfile

Dockerfile

@@ -1,54 +0,0 @@
-FROM ubuntu:20.04
-LABEL MAINTAINER "chris@chrishayward.xyz"
-
-ENV CC=gcc-10
-ENV NATIVE_FULL_AOT=1
-ENV DEBIAN_FRONTEND=noninteractive
-
-WORKDIR /usr/src
-RUN apt update -y \
-    && install -y git \
-    && git clone https://github.com/djcb/mu.git \
-    && git clone https://git.savannah.gnu.org/git/emacs.git
-
-RUN apt install -y \
-    apt-transport-https \
-    ca-certificates \
-    curl \
-    gnupg-agent \
-    software-properties-common
-
-RUN add-apt-repository ppa:ubuntu-toolchain-r/ppa \
-    && apt update -y \
-    && apt install -y \
-    gcc-10 \
-    libgccjit0 \
-    libgccjit-10-dev
-
-RUN apt install -y \
-    libjansson4 \
-    libjansson-dev
-
-RUN apt install -y \
-    isync
-    libxapian-dev \
-    libgmime-3.0-dev
-
-RUN sed -i 's/# deb-src/deb-src' /etc/apt/sources.list \
-    && apt update -y \
-    && apt build-dep -y emacs
-
-WORKDIR /usr/src/emacs
-RUN ./autogen.sh \
-    && ./configure --with-native-compilation --with-mailutils
-    && make -j 2
-    && make install
-
-WORKDIR /usr/src/mu
-RUN ./autogen.sh \
-    && ./configure
-    && make
-    && make install
-
-WORKDIR /usr/src/app
-ENTRYPOINT [ "emacs" ]