refacto: Changing some docker images to hardened non-root ones + README update

node_modules/.package-lock.json

@@ -132,6 +132,23 @@
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       "license": "MIT"
     },
+    "node_modules/cors": {
+      "version": "2.8.6",
+      "resolved": "https://registry.npmjs.org/cors/-/cors-2.8.6.tgz",
+      "integrity": "sha512-tJtZBBHA6vjIAaF6EnIaq6laBBP9aq/Y3ouVJjEfoHbRBcHBAHYcMh/w8LDrk2PvIMMq8gmopa5D4V8RmbrxGw==",
+      "license": "MIT",
+      "dependencies": {
+        "object-assign": "^4",
+        "vary": "^1"
+      },
+      "engines": {
+        "node": ">= 0.10"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/express"
+      }
+    },
     "node_modules/debug": {
       "version": "2.6.9",
       "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
@@ -641,6 +658,15 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/object-assign": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz",
+      "integrity": "sha512-rJgTQnkUnH1sFw8yT6VSU3zD3sWmu6sZhIseY8VX+GRu3P6F7Fu+JNDoXfklElbLJSnc3FUQHVe4cU5hj+BcUg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/object-inspect": {
       "version": "1.13.4",
       "resolved": "https://registry.npmjs.org/object-inspect/-/object-inspect-1.13.4.tgz",