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

config/game.settings.json

@@ -1,17 +1,16 @@
 {
   "clickCooldownSeconds": 10,
   "databaseWipeoutIntervalSeconds": 21600,
-  "debugModeForTeams": true,
   "configReloadIntervalSeconds": 30,
   "elementWorth": {
-    "common": 1,
-    "food": 2,
-    "petrol": 3,
-    "goods": 4,
-    "industry": 5,
-    "medic": 6,
-    "money": 7,
-    "science": 8
+    "common": 0.1,
+    "food": 0.2,
+    "petrol": 0.3,
+    "goods": 0.4,
+    "industry": 0.5,
+    "medic": 0.6,
+    "money": 0.7,
+    "science": 0.8
   },
   "resourceWorth": {
     "common": {