Program-Flow.md

 # Program Flow
 
-In order tu build a full HTML website based on the topics in `/topics` the application runs as follows
+In order tu build a full HTML website based on the topics in `/topics` the application `/bin/build_webpage.sh` executes the following steps:
 
-* Preprocessor
-* Pandoc and SSI_Directives
-* Postprocessing
+* Preprocessing
+* Pandoc conversion from `.md` to `.html`
+* Postprocessing of files (adding SSI directives, replacement of HTML tags)
 * README creation
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