feat: Initialize Strata KitchenSink application boilerplate

This sets up the foundational structure for a .NET Core 6 / React project,
demonstrating common architectural patterns, Docker integration, and key
Strata libraries for API, data access (EF Core), background jobs (Hangfire),
real-time communication (SignalR), and various frontend UI components.

Dockerfile.hangfire

@@ -0,0 +1,66 @@
+ARG PROJECT=Strata.KitchenSink
+ARG VERSION=0.0.0
+
+##############
+# Base image #
+##############
+FROM ecr.ops.stratanetwork.net/strata.microsoft.dotnet.aspnet:6.0 AS base
+
+###############
+# Build image #
+###############
+FROM ecr.ops.stratanetwork.net/strata.microsoft.dotnet.sdk:6.0 AS build
+ARG PROJECT
+ARG VERSION
+
+WORKDIR /src
+
+# Copy project files and restore
+COPY ["${PROJECT}.sln", "${PROJECT}.sln"]
+COPY src/**/*.csproj ./
+RUN for file in $(ls *.csproj); do mkdir -p src/${file%.*}/ && mv $file src/${file%.*}/; done
+COPY tests/**/*.csproj ./
+RUN for file in $(ls *.csproj); do mkdir -p tests/${file%.*}/ && mv $file tests/${file%.*}/; done
+
+RUN dotnet restore "${PROJECT}.sln" \
+    --source https://api.nuget.org/v3/index.json \
+    --source https://proget.sdt.local/nuget/nuget/v3/index.json
+
+
+# Copy files and build
+COPY . .
+
+RUN dotnet build "${PROJECT}.sln" \
+    --configuration Release \
+    --no-restore
+
+# Run unit tests
+RUN dotnet test "${PROJECT}.sln" \
+    --configuration Release \
+    --no-restore \
+    --no-build \
+    --verbosity=normal \
+    -p:CollectCoverage=true \
+    -p:CoverletOutputFormat="opencover" \
+    -p:CoverletOutput=/src/cover.xml
+
+# Publish project
+RUN dotnet publish "src/${PROJECT}.Hangfire/${PROJECT}.Hangfire.csproj" \
+    --configuration Release \
+    --no-restore \
+    --no-build \
+    --output /app
+
+###############
+# Final image #
+###############
+FROM base AS final
+ARG PROJECT
+WORKDIR /app
+ARG PROJECT
+ENV PROJECTDLL=${PROJECT}.Hangfire.dll
+ENV DOTNET_ENVIRONMENT=Development
+ENV ASPNETCORE_ENVIRONMENT=Development
+
+COPY --from=build /app /app
+ENTRYPOINT dotnet ${PROJECTDLL}