Adding pre-commit and updating Docker file to place the web application files in a different location

Author: nss10

.pre-commit-config.yaml

@@ -0,0 +1,6 @@
+repos:
+    -   repo: git@github.com:Yelp/detect-secrets
+        rev: v0.13.1
+        hooks:
+        -   id: detect-secrets
+            args: ['--baseline', '.secrets.baseline']