add configuration files

.editorconfig

@@ -0,0 +1,21 @@
+# This file allows you to configure your editor using [EditorConfig](https://EditorConfig.org).
+# Make sure to install the EditorConfig plugin if your editor doesn't come with built-in support.
+
+# top-most EditorConfig file
+root = true
+
+[*]
+indent_style = space # useTabs=false in prettier
+indent_size = 2 # tabWidth in prettier
+end_of_line = lf # endOfLine in prettier
+charset = utf-8 # not configurable in prettier
+trim_trailing_whitespace = false # not configurable in prettier
+insert_final_newline = true # always true in prettier
+
+[{/publication/**,/node_modules/**,index.html,validation/tm-json-schema-validation.json,context/td-context-1.1.jsonld,visualization/*.png,visualization/*.svg}]
+indent_style = unset
+indent_size = unset
+end_of_line = unset
+charset = unset
+trim_trailing_whitespace = unset
+insert_final_newline = unset

.prettierignore

@@ -0,0 +1,18 @@
+# Files added by default, repeating for transparency
+**/.git
+**/.svn
+**/.hg
+**/node_modules
+
+# Publication-related files
+publication
+errata.html
+errata11.html
+
+# Automatically generated files
+ontology/*.html
+index.html
+validation/tm-json-schema-validation.json
+context/td-context-1.1.jsonld
+visualization/*.png
+visualization/*.svg

.prettierrc.json

@@ -0,0 +1,6 @@
+{
+  "tabWidth": 2,
+  "useTabs": false,
+  "endOfLine": "lf",
+  "printWidth": 120
+}

package.json

@@ -11,7 +11,8 @@
     "x-validation": "node validation/td-cross-validation.js",
     "generateTmSchema": "node validation/tmSchemaGenerator.js",
     "prepare": "husky install",
-    "tmTest": "node validation/test.js"
+    "tmTest": "node validation/test.js",
+    "format": "npx prettier . --write"
   },
   "repository": {
     "type": "git",