refactor: make optimized Dockerfile the default - remove full variant

- Rename Dockerfile.optimized to Dockerfile (now the default)
- Keep old Dockerfile as Dockerfile.old for reference
- Update GitHub Actions to use default Dockerfile
- Remove build-full job - only one image variant now
- Remove docker-compose.optimized.yml and other variants
- Update all documentation to reflect single image approach

The optimized 283MB image is now the only n8n-MCP Docker image.
This simplifies the user experience and provides the best solution
for all use cases.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Dockerfile.old

@@ -0,0 +1,87 @@
+# Stage 1: Dependencies
+FROM node:20-alpine AS deps
+WORKDIR /app
+COPY package*.json ./
+# Configure npm for better reliability in CI
+RUN npm config set fetch-retries 5 && \
+    npm config set fetch-retry-mintimeout 20000 && \
+    npm config set fetch-retry-maxtimeout 120000 && \
+    npm config set fetch-timeout 300000
+# Install all dependencies including dev for building
+RUN npm ci
+
+# Stage 2: Production Dependencies
+FROM node:20-alpine AS prod-deps
+WORKDIR /app
+COPY package*.json ./
+# Copy all dependencies from deps stage
+COPY --from=deps /app/node_modules ./node_modules
+# Prune to production only (much faster than fresh install)
+RUN npm prune --omit=dev
+
+# Stage 3: Builder
+FROM node:20-alpine AS builder
+WORKDIR /app
+COPY package*.json ./
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+# Build TypeScript
+RUN npm run build
+
+# Stage 4: Runtime
+FROM node:20-alpine AS runtime
+WORKDIR /app
+
+# Install only essential tools (flock is in util-linux)
+RUN apk add --no-cache curl su-exec util-linux && \
+    rm -rf /var/cache/apk/*
+
+# Copy production dependencies from prod-deps stage
+COPY --from=prod-deps /app/node_modules ./node_modules
+COPY package*.json ./
+
+# Copy built application
+COPY --from=builder /app/dist ./dist
+
+# Create data directory
+RUN mkdir -p /app/data
+
+# Copy necessary source files for database initialization
+COPY src/database/schema.sql ./src/database/
+COPY scripts ./scripts
+
+# Copy necessary files
+COPY .env.example .env.example
+COPY LICENSE LICENSE
+COPY README.md README.md
+
+# Add container labels
+LABEL org.opencontainers.image.source="https://github.com/czlonkowski/n8n-mcp"
+LABEL org.opencontainers.image.description="n8n MCP Server - Simple Version"
+LABEL org.opencontainers.image.licenses="Sustainable-Use-1.0"
+LABEL org.opencontainers.image.vendor="n8n-mcp"
+LABEL org.opencontainers.image.title="n8n-mcp"
+
+# Create data directory and fix permissions
+RUN mkdir -p /app/data && \
+    addgroup -g 1001 -S nodejs && \
+    adduser -S nodejs -u 1001 && \
+    chown -R nodejs:nodejs /app
+
+# Copy entrypoint script
+COPY docker/docker-entrypoint.sh /usr/local/bin/
+RUN chmod +x /usr/local/bin/docker-entrypoint.sh
+
+# Switch to non-root user
+USER nodejs
+
+# Expose HTTP port
+EXPOSE 3000
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=10s --start-period=10s --retries=3 \
+  CMD curl -f http://127.0.0.1:3000/health || exit 1
+
+# Entrypoint
+ENTRYPOINT ["/usr/local/bin/docker-entrypoint.sh"]
+CMD ["node", "dist/mcp/index.js"]