Use arch for docker image

Dockerfile

@@ -1,10 +1,7 @@
-FROM rust
+FROM archlinux
 COPY . /root/felix
 
-RUN apt-get -y update
-RUN apt-get -y install fdisk
-RUN apt-get -y install mtools
-RUN apt-get -y install dosfstools
+RUN pacman --noconfirm -Syu mtools dosfstools base-devel rustup
 
 WORKDIR /root/felix
 CMD ["./build.sh"]

README.md

@@ -57,7 +57,7 @@ First make sure you have Docker installed. Then:
 2. Change dir to repo `cd felix`
 3. Build the image `docker build -t felix-image .`
 4. Run the container `docker run --name felix-container felix-image`
-5. Copy build from container to host `docker cp felix-container:/root/felix/build build`
+5. Copy build from container to host `docker cp felix-container:/root/felix/build .`
 
 ### Build using script
 Make sure you have `Rust`,`mtools`,`dosfstools` and `fdisk` installed on your system. Then: