feat: add Docker deployment support

Dockerfile.parser

@@ -0,0 +1,60 @@
+# =============================================================================
+# Profilarr Parser Dockerfile
+# =============================================================================
+# .NET 8.0 microservice for parsing release titles
+# This service is OPTIONAL - only needed for custom format/quality profile testing
+#
+# Build:  docker build -f Dockerfile.parser -t profilarr-parser .
+# Run:    docker run -p 5000:5000 profilarr-parser
+
+# -----------------------------------------------------------------------------
+# Stage 1: Build
+# -----------------------------------------------------------------------------
+FROM mcr.microsoft.com/dotnet/sdk:8.0-alpine AS builder
+
+WORKDIR /build
+
+# Copy project file first for better layer caching
+COPY src/services/parser/Parser.csproj ./
+RUN dotnet restore
+
+# Copy source and build
+COPY src/services/parser/ ./
+RUN dotnet publish -c Release -o /app --no-restore
+
+# -----------------------------------------------------------------------------
+# Stage 2: Runtime
+# -----------------------------------------------------------------------------
+FROM mcr.microsoft.com/dotnet/aspnet:8.0-alpine
+
+# Labels for container metadata
+LABEL org.opencontainers.image.title="Profilarr Parser"
+LABEL org.opencontainers.image.description="Release title parser for Profilarr (optional)"
+LABEL org.opencontainers.image.source="https://github.com/Dictionarry-Hub/profilarr"
+LABEL org.opencontainers.image.licenses="AGPL-3.0"
+
+WORKDIR /app
+
+# Copy built application
+COPY --from=builder /app ./
+
+# Create non-root user
+RUN addgroup -g 1000 parser && \
+    adduser -u 1000 -G parser -D -h /app parser
+
+# Switch to non-root user
+USER parser
+
+# Environment variables
+ENV ASPNETCORE_URLS=http://+:5000
+ENV ASPNETCORE_ENVIRONMENT=Production
+
+# Expose port
+EXPOSE 5000
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=5s --start-period=5s --retries=3 \
+    CMD wget -qO- http://localhost:5000/health || exit 1
+
+# Run the application
+ENTRYPOINT ["dotnet", "Parser.dll"]