Fix prettifier configuration after bump; Fix issues found by new versions of prettifier & eslint;

.prettierrc.json

@@ -2,5 +2,6 @@
   "semi": true,
   "singleQuote": true,
   "trailingComma": "all",
-  "printWidth": 100
+  "printWidth": 100,
+  "arrowParens": "avoid"
 }

src/model/docker.js

@@ -12,7 +12,7 @@ class Docker {
       --build-arg IMAGE=${baseImage} \
       --tag ${tag}`;
 
-    await exec(command, null, { silent });
+    await exec(command, undefined, { silent });
 
     return tag;
   }
@@ -64,7 +64,7 @@ class Docker {
         ${useHostNetwork ? '--net=host' : ''} \
         ${image}`;
 
-    await exec(command, null, { silent });
+    await exec(command, undefined, { silent });
   }
 }
 

src/model/image-tag.test.js

@@ -23,7 +23,7 @@ describe('ImageTag', () => {
       expect(() => new ImageTag({ version })).not.toThrow();
     });
 
-    test.each(['some version', '', 1, null])('throws for incorrect versions %p', version => {
+    test.each(['some version', '', 1, undefined])('throws for incorrect versions %p', version => {
       expect(() => new ImageTag({ version })).toThrow();
     });
   });

src/model/input.js

@@ -8,7 +8,7 @@ class Input {
   }
 
   static isValidFolderName(folderName) {
-    const validFolderName = new RegExp(/^(\.|\.\/)?(\.?\w+([-_]?\w+)*\/?)*$/);
+    const validFolderName = new RegExp(/^(\.|\.\/)?(\.?\w+([_-]?\w+)*\/?)*$/);
 
     return validFolderName.test(folderName);
   }