Merge pull request #1 from zwoefler/fix-dockerfile

Fix dockerfile

Dockerfile

@@ -1,19 +1,22 @@
-FROM centos:7 AS build
+FROM ubuntu:20.04 AS build
 WORKDIR /App
 
-RUN ulimit -n 1024 && yum -y update 
-RUN ulimit -n 1024 && yum -y install curl zlib-devel build-essential
-RUN ulimit -n 1024 && yum -y groupinstall 'Development Tools'
+# Set variables to configure timezone non-interactively
+ENV DEBIAN_FRONTEND=noninteractive
+ENV TZ=Etc/UTC
+
+RUN apt-get update && apt-get install -y curl zlib1g-dev build-essential libicu-dev tzdata
+
 RUN curl -sSL https://dot.net/v1/dotnet-install.sh | bash /dev/stdin -c 8.0
+
 COPY *.cs ./
 COPY *.csproj ./
-ARG DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=1
 ARG TARGET_VERSION
 RUN ~/.dotnet/dotnet publish -r linux-x64 --configuration Release -p:Version=$TARGET_VERSION --self-contained=true -p:PublishAot=true -p:StripSymbols=true -o build
 
-FROM scratch as output
+FROM scratch AS output
 COPY --from=build /App/build/VmChamp /VmChamp
 
-FROM build as release
+FROM build AS release
 COPY --from=build /App/build/VmChamp /VmChamp