add .dockerignore file

Ignore node_modules in build to prevent issue with COPY or bind mounts
when dependencies already exist on the host's filesystem

Signed-off-by: David Karlsson <35727626+dvdksn@users.noreply.github.com>

.dockerignore

@@ -0,0 +1,2 @@
+node_modules
+Dockerfile

package.json

@@ -6,7 +6,7 @@
   "scripts": {
     "prettify": "prettier -l --write \"**/*.js\"",
     "test": "jest",
-    "dev": "nodemon src/index.js"
+    "dev": "nodemon -L src/index.js"
   },
   "dependencies": {
     "express": "^4.18.2",