Some cleanup and update to release images

Power/Service/Dockerfile

@@ -1,8 +1,8 @@
-FROM mcr.microsoft.com/dotnet/core/aspnet:3.0.0-preview7-buster-slim AS base
+FROM mcr.microsoft.com/dotnet/core/aspnet:3.0.0-alpine AS base
 WORKDIR /app
 EXPOSE 80
 
-FROM mcr.microsoft.com/dotnet/core/sdk:3.0.100-preview7-buster AS build
+FROM mcr.microsoft.com/dotnet/core/sdk:3.0.100-alpine AS build
 WORKDIR /src
 COPY ["./Service.csproj", "./"]
 RUN dotnet restore "Service.csproj"

Power/Service/Models/PowerChannel.cs

@@ -3,7 +3,7 @@ using System.Text.Json.Serialization;
 
 namespace ChrisKaczor.HomeMonitor.Power.Service.Models
 {
-    [UsedImplicitly]
+    [PublicAPI]
     public class PowerChannel
     {
         [JsonPropertyName("type")]

Power/Service/Models/PowerSample.cs

@@ -1,9 +1,11 @@
-using System;
+using JetBrains.Annotations;
+using System;
 using System.Collections.Generic;
 using System.Text.Json.Serialization;
 
 namespace ChrisKaczor.HomeMonitor.Power.Service.Models
 {
+    [PublicAPI]
     public class PowerSample
     {
         [JsonPropertyName("sensorId")]

Power/Service/Service.csproj

@@ -1,7 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <SuppressNETCoreSdkPreviewMessage>true</SuppressNETCoreSdkPreviewMessage>
     <TargetFramework>netcoreapp3.0</TargetFramework>
     <AspNetCoreHostingModel>InProcess</AspNetCoreHostingModel>
     <AssemblyName>ChrisKaczor.HomeMonitor.Power.Service</AssemblyName>