Add check if file exists before linting.

src/read_files.js

@@ -5,10 +5,20 @@ const readFilesToAnalyze = async (githubWorkspace, fileGlob) => {
   let fileContents = [];
   for (let i = 0, len = files.length; i < len; i++) {
     console.log(`FILE ${i} ${files[i]}`);
-    fileContents.push({
-      file: files[i],
-      content: fs.readFileSync(files[i], 'utf-8')
-    });
+    try {
+      if (fs.existsSync(files[i])) {
+        //file exists
+        console.log("File Exists, adding it to be linted")
+        fileContents.push({
+          file: files[i],
+          content: fs.readFileSync(files[i], 'utf-8')
+        });
+      } else {
+        console.log("File does not exist, if the file was intentially deleted during the PR ignore this comment")
+      }
+    } catch(err) {
+      console.error(err)
+    }
   }
 
   return fileContents;