Add initial implementation of Hopfield and Hamming networks with web interface

- Create Dockerfile and entrypoint script for application setup
- Implement pattern loading from Excel and weight caching
- Develop core functions for Hopfield and Hamming networks
- Add Sinatra web server for user interaction
- Create HTML interface for displaying patterns and results
- Include necessary gems in Gemfile and lockfile
- Add .dockerignore and .gitignore files

loader.rb

@@ -0,0 +1,11 @@
+require 'roo'
+
+def load_patterns(file)
+  xlsx = Roo::Spreadsheet.open(file)
+  xlsx.sheets.each_with_object({}) do |sheet_name, patterns|
+    xlsx.default_sheet = sheet_name
+    matrix = (1..8).map { |row| (1..8).map { |col| xlsx.cell(row, col).to_s.strip.downcase == 'x' ? 1 : -1 } }
+    patterns[sheet_name.to_sym] = matrix
+  end
+end
+