add some default files

Author: ManfredLange

.editorconfig

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+# top-most EditorConfig file
+root = true
+
+# Unix-style newlines with a newline ending every file
+[*]
+end_of_line = lf
+indent_style = space
+indent_size = 3
+insert_final_newline = true
+# Do not add the following without confirming that nullable warnings and errors are still honored
+# generated_code = true

.env

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+# Name of the project so that services specified in docker-compose for this project
+# use the virtual network of that name:
+COMPOSE_PROJECT_NAME=rimutec

.gitattributes

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+# Ensure all files git considers to be text to have normalized (LF) line endings in the repository
+# https://stackoverflow.com/a/33890199/411428
+# [Manfred, 19sep2021]
+* text=auto