updated dependencies

Dockerfile

@@ -1,18 +1,20 @@
-# Build the application
-#FROM mcr.microsoft.com/dotnet/sdk:7.0 as build
-FROM --platform=$BUILDPLATFORM mcr.microsoft.com/dotnet/nightly/sdk:8.0-preview AS build
-ARG TARGETARCH
-WORKDIR /app
+# syntax=docker/dockerfile:1.3
+
+# Create a stage for building the application.
+FROM --platform=$BUILDPLATFORM mcr.microsoft.com/dotnet/sdk:8.0-alpine AS build
+ENV DOTNET_CLI_TELEMETRY_OPTOUT 1
 
-# restore dependencies
-COPY ./src/faas-metrics.csproj ./
-RUN dotnet restore -a $TARGETARCH
+COPY src /source
 
-COPY ./src/. ./
+WORKDIR /source
+
+# This is the architecture you’re building for, which is passed in by the builder.
+# Placing it here allows the previous steps to be cached across architectures.
+ARG TARGETARCH
 
 # generate random password for self-signed certificate
 RUN cat /dev/urandom | LC_ALL=C tr -dc 'a-zA-Z0-9' | fold -w 12 | head -n 1 > certpassword
-RUN truncate -s -1 certpassword
+RUN sed -i '$ d' certpassword
 
 # generate self-signed certificate
 #RUN dotnet dev-certs https -ep dist/cert.pfx -p $(cat certpassword) -v
@@ -21,18 +23,26 @@ RUN truncate -s -1 certpassword
 RUN sed -i'' s/'CertFilename = string.Empty/CertFilename = "cert.pfx"'/ HttpsOptions.cs
 RUN sed -i'' s/'CertPassword = string.Empty/CertPassword = "'$(cat certpassword | base64)'"'/ HttpsOptions.cs
 
-# build application
-RUN dotnet publish -c release -a $TARGETARCH -o dist faas-metrics.csproj
-
-# The runner for the application
-FROM mcr.microsoft.com/dotnet/aspnet:7.0 as final
-
-RUN addgroup faas-metrics && useradd -G faas-metrics metrics-user
-
+# Build the application.
+# Leverage a cache mount to /root/.nuget/packages so that subsequent builds don't have to re-download packages.
+# If TARGETARCH is "amd64", replace it with "x64" - "x64" is .NET's canonical name for this and "amd64" doesn't
+#   work in .NET 6.0.
+RUN --mount=type=cache,id=nuget,target=/root/.nuget/packages \
+    dotnet publish -a ${TARGETARCH/amd64/x64} --use-current-runtime --self-contained false -o /app
+
+# Create a new stage for running the application that contains the minimal
+# runtime dependencies for the application. This often uses a different base
+# image from the build stage where the necessary files are copied from the build
+# stage.
+FROM mcr.microsoft.com/dotnet/aspnet:8.0-alpine AS final
 WORKDIR /app
-COPY --from=build /app/dist/ ./
-RUN chown metrics-user:faas-metrics -R .
 
-USER metrics-user
+# Copy everything needed to run the app from the "build" stage.
+COPY --from=build /app .
+
+# Switch to a non-privileged user (defined in the base image) that the app will run under.
+# See https://docs.docker.com/go/dockerfile-user-best-practices/
+# and https://github.com/dotnet/dotnet-docker/discussions/4764
+USER $APP_UID
 
-ENTRYPOINT [ "dotnet", "faas-metrics.dll" ]
+ENTRYPOINT ["dotnet", "faas-metrics.dll"]

LICENSE

@@ -175,7 +175,7 @@
 
    END OF TERMS AND CONDITIONS
 
-   Copyright 2023 Goncalo Oliveira
+   Copyright 2024 Goncalo Oliveira
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.

metrics.sln

@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.5.002.0
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "faas-metrics", "src\faas-metrics.csproj", "{FDCFBC51-D7A7-4D1A-9FBE-9626D034E822}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{FDCFBC51-D7A7-4D1A-9FBE-9626D034E822}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{FDCFBC51-D7A7-4D1A-9FBE-9626D034E822}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{FDCFBC51-D7A7-4D1A-9FBE-9626D034E822}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{FDCFBC51-D7A7-4D1A-9FBE-9626D034E822}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {A5213363-8D95-455E-BCDC-594F3DB7B6A0}
+	EndGlobalSection
+EndGlobal

src/AppVersion.cs

@@ -0,0 +1,23 @@
+using System.Reflection;
+
+namespace System;
+
+internal static class AppVersion
+{
+    private static readonly Lazy<string> lazyValue = new( () =>
+    {
+        var assembly = Assembly.GetExecutingAssembly();
+        var value = assembly.GetName().Version?.ToString( 3 ) ?? "0.0.0";
+
+        var infoVerAttr = assembly.GetCustomAttribute<AssemblyInformationalVersionAttribute>();
+
+        if ( infoVerAttr != null )
+        {
+            return infoVerAttr.InformationalVersion;
+        }
+
+        return value;
+    } );
+
+    public static string Value => lazyValue.Value;
+}

src/faas-metrics.csproj

@@ -2,16 +2,18 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net7.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <RootNamespace>Faactory.Kubernetes.Metrics</RootNamespace>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
+
+    <Version>0.2.0</Version>
   </PropertyGroup>
 
-  <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.Configuration.CommandLine" Version="7.0.0" />
-    <PackageReference Include="System.CommandLine" Version="2.0.0-beta4.22272.1" />
-    <PackageReference Include="YamlDotNet" Version="13.0.1" />
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Configuration.CommandLine" Version="8.0.0" />
+    <PackageReference Include="System.CommandLine" Version="2.0.0-beta4.22272.1" />
+    <PackageReference Include="YamlDotNet" Version="16.0.0" />
   </ItemGroup>
 
 </Project>