Prepare Coolify deployment

.dockerignore

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+.git
+.gitignore
+.vs
+**/bin
+**/obj
+**/*.user
+**/*.suo
+README*
+data
+**/data

Dockerfile

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+FROM mcr.microsoft.com/dotnet/sdk:10.0-alpine AS build
+WORKDIR /src
+
+COPY Notemark/Notemark.csproj Notemark/
+RUN dotnet restore Notemark/Notemark.csproj \
+    --source https://api.nuget.org/v3/index.json
+
+COPY Notemark/ Notemark/
+RUN dotnet publish Notemark/Notemark.csproj \
+    --configuration Release \
+    --output /app/publish \
+    --no-restore
+
+FROM mcr.microsoft.com/dotnet/aspnet:10.0-alpine AS final
+WORKDIR /app
+
+ENV ASPNETCORE_URLS=http://+:8080 \
+    ASPNETCORE_FORWARDEDHEADERS_ENABLED=true \
+    NOTEMARK_DATA_DIR=/app/data \
+    DOTNET_EnableDiagnostics=0
+
+COPY --from=build /app/publish .
+RUN mkdir -p /app/data && chown -R app:app /app
+
+USER app
+EXPOSE 8080
+VOLUME ["/app/data"]
+
+HEALTHCHECK --interval=30s --timeout=5s --start-period=15s --retries=3 \
+    CMD wget --quiet --spider http://127.0.0.1:8080/ || exit 1
+
+ENTRYPOINT ["dotnet", "Notemark.dll"]