Update default fonts to Computer Modern family (#1)

* Update default fonts to Computer Modern family

* Add requirements and installation instructions

* Add link to CMU font

Author: tomakado

README.md

@@ -1,3 +1,20 @@
 # Defer Panic CLI
 
 Toolkit for managing Defer Panic articles and other stuff.
+
+## Requirements
+
+* [pandoc](https://pandoc.org)
+* xelatex (for exporting to PDF)
+* [Computer Modern Unicode fonts](https://cm-unicode.sourceforge.io/index.html) (if you want to use them for exporting to PDF) 
+
+## Install
+
+Go to Releases page and download archive with latest version for your platform.
+
+If you want to build Defer Panic CLI manually, make sure you have Go 1.19+ on your machine, then run:
+
+```shell
+go install github.com/defer-panic/dp-cli@latest
+```
+

cmd/article_generate.go

@@ -114,15 +114,15 @@ func readDataFromInput() (*Data, error) {
 	}
 
 	mainFontInput := textinput.New("What main font should be used?")
-	mainFontInput.InitialValue = "Times New Roman"
+	mainFontInput.InitialValue = "CMUSerif-Roman"
 
 	mainFont, err := mainFontInput.RunPrompt()
 	if err != nil {
 		return nil, err
 	}
 
 	monoFontInput := textinput.New("What monospace font should be used?")
-	monoFontInput.InitialValue = "Fira Code"
+	monoFontInput.InitialValue = "CMUTypewriter-Regular"
 
 	monoFont, err := monoFontInput.RunPrompt()
 	if err != nil {